水工混凝土配合比設(shè)計(jì)規(guī)程

內(nèi)容概要

During the compiling process, this Standard not only absorbssome relevant contents in the similar domestic and internationalstandards that are suitable for the application of hydraulic concrete inChina, but also emphasizes the characteristics of mass hydraulicconcrete. With the advancement of hydraulic concrete technology, theuse of admixtures and additives has become more and more popular,and widespread attentions have been paid to the durability of concrete.Therefore, changes of stipulations in this Standard are more focusedon the use of admixtures, and additives and the durability of concrete.

書籍目錄

Foreword1 Scope2 Normative References3 Terms and Symbols　3.1 Terms　3.2 Symbols4 General5 Determination of Required Average Compressive Strength6 Selection of Basic Parameters for Mix Design  6.1 Water-eementitious material ratio  6.2 Water Content　6.3 Aggregate Gradation and Sand Ratio　6.4 Admixture and Additive Content7 Calculation of Concrete Mix Proportion8 Trial Mixing, Adjustment and Determination of Concrete　Mix Proportion　8.1 Trial Mixing　8.2 Adjustment　8.3 Detenmnation9 Mix Design of Special Concrete10 Mix Design of Hydranlic Mortar　10.1 Basic Principles of Mortar Mix Design　10.2 Determination of Required Average Compressive Strength　10.3 Calculation of Mortar Mix Proportion　10.4 Trial Mixing, Adjustment and Determination of Mortar Mix Proportion

章節(jié)摘錄

6　Selection of Basic Parameters for Mix Design6.1　water-cementitious material ratio6.1.1　The water-cementitions material ratio shall be determined bytest according to the design requirements for the concrete strength,and shall comply with the stipulations in DL/T 5144.6.1.2　The water-cementitious material ratio shall also meet thedesign requirements of impermeability and frost resistance grade. Theimpermeability and frost resistance grades are related to types ofcement, water-cementitious material ratio, types and contents ofadmixtures and additives, curing age and so on. For the large andmedium projects, the relevant curve shall be established by test andthe water-cementitious material ratio should be determined accordingto the test result and meet the requirements of the designed technicalindices. If test data are not available, the water-cementitious materialratio for anti-freezing concrete should be determined according to thestipulations in DL／T 5082, based on frost resistance grade and themaximum aggregate size.6.1.3　For the concrete mixed with additives, the maximum water-cementitious material ratio shall be lowered appropriately anddetermined by test.

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《水工混凝土配合比設(shè)計(jì)規(guī)程(DL/T 5330-2005)》由中國電力出版社出版。

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