油井水泥外加劑 減阻劑檢測(cè)

油井水泥外加劑 減阻劑檢測(cè)項(xiàng)目報(bào)價(jià)？??解決方案？??檢測(cè)周期？??樣品要求？

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GB/T 19139-2012油井水泥試驗(yàn)方法

本標(biāo)準(zhǔn)規(guī)定了油井水泥應(yīng)用性能的試驗(yàn)方法和有關(guān)參數(shù)的計(jì)算，對(duì)于水泥石抗壓強(qiáng)度試驗(yàn)和水泥漿稠化時(shí)間試驗(yàn)，還給出了具有代表性的試驗(yàn)方案。本標(biāo)準(zhǔn)適用于油、氣井注水泥作業(yè)用油井水泥漿的設(shè)計(jì)和性能評(píng)價(jià)，油井水泥漿可基于（但不限于）GB 10238規(guī)定的油井水泥級(jí)別和類型。

GB/T 28911-2012石油天然氣鉆井工程術(shù)語(yǔ)

本標(biāo)準(zhǔn)規(guī)定了石油天然氣鉆井工程專用的術(shù)語(yǔ)。本標(biāo)準(zhǔn)適用于石油天然氣鉆井工程領(lǐng)域，也適用于石油天然氣工業(yè)的其他領(lǐng)域。

CECS 246-2008給水排水工程頂管技術(shù)規(guī)程

本規(guī)程主要適用于DN800以上使用頂管機(jī)頂進(jìn)的給水排水工程頂管工程的設(shè)計(jì)、施工和驗(yàn)收，小直徑頂管工程和非給水排水工程的頂管工程也可參照使用。

SY/T 5504.1-2013油井水泥外加劑評(píng)價(jià)方法第1部分:緩凝劑

SY/T 5504的本部分規(guī)定了油氣井注水泥作業(yè)用油井水泥緩凝劑的性能要求、評(píng)價(jià)方法及評(píng)價(jià)報(bào)告。本部分適用于油氣井注水泥作業(yè)用油井水泥緩凝劑的評(píng)價(jià)。

SY/T 5504.2-2013油井水泥外加劑評(píng)價(jià)方法第2部分:降 失水劑

SY/T 5504的本部分規(guī)定了油氣井注水泥作業(yè)用油井水泥降失水劑的性能要求、評(píng)價(jià)方法及評(píng)價(jià)報(bào)告。本部分適用于油氣井注水泥作業(yè)用油井水泥降失水劑的評(píng)價(jià)。

SY/T 5504.3-2018油井水泥外加劑評(píng)價(jià)方法 第3部分:減阻劑

SY/T 5504的本部分規(guī)定了油氣井注水泥作業(yè)用油井水泥減阻劑的性能要求、試驗(yàn)方法以及評(píng)價(jià)報(bào)告。本部分適用于油氣井注水泥作業(yè)用油井水泥減阻劑的評(píng)價(jià)。

SY/T 5504.7-2010油井水泥外加劑評(píng)價(jià)方法 第7部分：加重劑

SY/T 5504的本部分規(guī)定了油井水泥加重劑的性能要求、試驗(yàn)方法以及評(píng)價(jià)報(bào)告。本部分適用于油井水泥加重劑的評(píng)價(jià)。

SY/T 5504.8-2013油井水泥外加劑評(píng)價(jià)方法第8部分:膨脹劑

SY/T 5504的本部分規(guī)定了油、氣井注水泥作業(yè)用油井水泥膨脹劑的性能要求、評(píng)價(jià)方法及評(píng)價(jià)報(bào)告。本部分適用于油、氣井注水泥作業(yè)用油井水泥膨脹劑的評(píng)價(jià)。

DZ/T 0260-2014地?zé)徙@探技術(shù)規(guī)程

本標(biāo)準(zhǔn)規(guī)定了地?zé)徙@探設(shè)備選擇、鉆探工藝、成井工藝、工程質(zhì)量、安全施工、職業(yè)健康及環(huán)境保護(hù)等技術(shù)工作要求,可作為地?zé)徙@探設(shè)計(jì)、施工、管理等各項(xiàng)工作的依據(jù)。本標(biāo)準(zhǔn)適用于勘探或開發(fā)地?zé)嵴羝偷責(zé)崴你@探工作。

TB 10014-2012鐵路工程地質(zhì)鉆探規(guī)程

本規(guī)程適用于鐵路工程地質(zhì)、水文地質(zhì)鉆探及物探測(cè)井、孔內(nèi)測(cè)試鉆孔的鉆探工作。

ASTM C494/C494M-2005a混凝土用化學(xué)外加劑標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows:1.1.1 Type A8212;Water-reducing admixtures,1.1.2 Type B8212;Retarding admixtures,1.1.3 Type C8212;Accelerating admixtures,1.1.4 Type D8212;Water-reducing and retarding admixtures,1.1.5 Type E8212;Water-reducing and accelerating admixtures,1.1.6 Type F8212;Water-reducing, high range admixtures, and1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures.1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1.Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200-mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017.Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence).Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete.1.3 This specification provides for three levels of testing.1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, and E) shall qualify for provisional compliance when the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the standard requirement of 100 % of reference strength, the compliance of the admixture to this standard is withdrawn and all users of the admixture shall be notified immediately. Uniformity and equivalence tests of Section 6 shall be carried out to provide results against which later comparisons can be made (See Note 4).Note 0&38212;Allowing for provisional compliance while retaining longer term compressive strength requirements promotes more rapid qualification of new materials, but also provides assurance that new admixture technologies will not exhibit unexpected longer term performance. The alternative compressive strength requirements in are based on statistical analysis of 103 Specification C 494/C 494M evaluation tests. The alternative requirements correspond to a 99 % probability of passing subsequent test age requirements.1.3.2 Level 28212;Limited retesting is descr

ASTM C494/C494M-2008混凝土化學(xué)外加劑標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, and 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, and E) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the standard requirement of 100 % of reference strength, the compliance of the admixture to this standard is withdrawn and all users

ASTM C494/C494M-2008a混凝土化學(xué)外加劑標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C 1017. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength requirements in Table 1 are met. If subsequent test results at 6 months or one year fail to meet the st

ASTM C494/C494M-2010混凝土用化學(xué)添加劑的標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressi

ASTM C494/C494M-2010a混凝土用化學(xué)添加劑的標(biāo)準(zhǔn)規(guī)格

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1.

ASTM C494/C494M-2011混凝土用化學(xué)添加劑的標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressi

ASTM C494/C494M-2012混凝土用化學(xué)添加劑的標(biāo)準(zhǔn)規(guī)范

1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1 Type A8212;Water-reducing admixtures, 1.1.2 Type B8212;Retarding admixtures, 1.1.3 Type C8212;Accelerating admixtures, 1.1.4 Type D8212;Water-reducing and retarding admixtures, 1.1.5 Type E8212;Water-reducing and accelerating admixtures, 1.1.6 Type F8212;Water-reducing, high range admixtures, 1.1.7 Type G8212;Water-reducing, high range, and retarding admixtures, and 1.1.8 Type S8212;Specific performance admixtures. 1.2 This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 18212;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M. Note 28212;The purchaser should ensure that the admixture supplied for use in the work is equivalent in composition to the admixture subjected to test under this specification (see Section 6, Uniformity and Equivalence). Note 38212;Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Compliance with the requirements of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. 1.3 This specification provides for three levels of testing. 1.3.1 Level 18212;During the initial approval stage, proof of compliance with the performance requirements defined in Table 1 demonstrates that the admixture meets the requirements of this specification. Admixtures (except for Types B, C, E, and S) shall qualify for provisional compliance when the physical requirements and any of the alternative compressive strength require

ASTM C494/C494M-2013混凝土用化學(xué)添加劑標(biāo)準(zhǔn)規(guī)格

1.1x00a0;This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1x00a0;Type Ax2014;Water-reducing admixtures, 1.1.2x00a0;Type Bx2014;Retarding admixtures, 1.1.3x00a0;Type Cx2014;Accelerating admixtures, 1.1.4x00a0;Type Dx2014;Water-reducing and retarding admixtures, 1.1.5x00a0;Type Ex2014;Water-reducing and accelerating admixtures, 1.1.6x00a0;Type Fx2014;Water-reducing, high range admixtures, 1.1.7x00a0;Type Gx2014;Water-reducing, high range, and retarding admixtures, and 1.1.8x00a0;Type Sx2014;Specific performance admixtures. 1.2x00a0;This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1-11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1-11.3. Note 1x2014;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.

ASTM C494/C494M-2015混凝土用化學(xué)外加劑的標(biāo)準(zhǔn)規(guī)格

1.1x00a0;This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the eight types as follows: 1.1.1x00a0;Type Ax2014;Water-reducing admixtures, 1.1.2x00a0;Type Bx2014;Retarding admixtures, 1.1.3x00a0;Type Cx2014;Accelerating admixtures, 1.1.4x00a0;Type Dx2014;Water-reducing and retarding admixtures, 1.1.5x00a0;Type Ex2014;Water-reducing and accelerating admixtures, 1.1.6x00a0;Type Fx2014;Water-reducing, high range admixtures, 1.1.7x00a0;Type Gx2014;Water-reducing, high range, and retarding admixtures, and 1.1.8x00a0;Type Sx2014;Specific performance admixtures. 1.2x00a0;This specification stipulates tests of an admixture with suitable concreting materials as described in 11.1 x2013; 11.3 or with cement, pozzolan, aggregates, and an air-entraining admixture proposed for specific work (11.4). Unless specified otherwise by the purchaser, the tests shall be made using concreting materials as described in 11.1 x2013; 11.3. Note 1:x00a0;It is recommended that, whenever practicable, tests be made using the cement, pozzolan, aggregates, air-entraining admixture, and the mixture proportions, batching sequence, and other physical conditions proposed for the specific work (11.4) because the specific effects produced by chemical admixtures may vary with the properties and proportions of the other ingredients of the concrete. For instance, Types F and G admixtures may exhibit much higher water reduction in concrete mixtures having higher cement factors than that listed in 12.1.1. Mixtures having a high range water reduction generally display a higher rate of slump loss. When high-range admixtures are used to impart increased workability (6 to 8-in. slump [150 to 200x2013;mm]), the effect may be of limited duration, reverting to the original slump in 30 to 60 min depending on factors normally affecting rate of slump loss. The use of chemical admixtures to produce high-slump (flowing) concrete is covered by Specification C1017/C1017M.