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Đặc điểm kỹ thuật tiêu chuẩn đối với phụ gia chức năng được sử dụng trong xi măng đông trong nước | l h Des gnat on C 688 00 Standard Specification for Functional Additions for Use in Hydraulic Cements1 This standard is issued under the fixed d ií r atic n C 688 the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This specification covers methods to imr i tij iUc Ukc effectiveness of a material to beneficially chmige the properties of hydraulic cements when the material is interground with the clinker during manufacture of the cement. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 The effect of additions in cement may markedly change properties other than those they are intended to modify. This specification ii dc t t ln d to less for such ciuun c t . Tabic 1 ss ets forth values for those properties of cement pastes and mortars that would permit a judgment of the changes effected by an addition. Likewise Table 2 sets forth similar criteria for concrete. Certain additions may be found effective for more than one purpose as indicated in 3.1.4 and 3.1.5. 2. Referenced Documents 2.1 ASTM Standards C 39 Test Method for Compressive Strength of Cylindrical Concrete Specimens2 C 78 Test Method for Flexural Strength of Concrete Using Simple Beam with Third-Point Loading 2 C 109 C 109M Test Method for Compressive Strength of Hydraulic Cement Mortars Using 2-in. or 50-mm Cube Specimens 3 C 143 Test Method for Slump of Hydraulic Cement Con-crete2 C 150 Specification for Pontai id Cement3 C 151 Test Method for Autoclave Expansion of Portland Cement3 C 157 Test Method for Length Change of Hardened Hydraulic Cement Mortar and Concrete2 C 187 Test Method for Normal Consistency of Hydraulic Cement3 C 191 Test Method for Time of Setting of Hydraulic Cement by Vicat Needle3 C 219 Terminology .
