Standard No.:	DL/T 5241-2010
English Name:	Technical specifications for durability of hydraulic concrete
Chinese Name:	水工混凝土耐久性技术规范
Chinese Classification:	P59    Water power engineering
Professional Classification:	DL    Professional Standard - Electricity
Source Content Issued by:	National Energy Administration
Issued on:	2010-05-01
Implemented on:	2010-10-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	12000 words
Translation Price(USD):	360.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements for the durability of hydraulic concrete freezing and thawing action, water erosion, abrasion and cavitation, reinforcing bar corrosion, alkali-aggregate reaction etc. This standard is applicable to large and medium-sized water resource and hydropower projects, and may be used as a reference in other projects. 2 Normative References The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest edition of the referenced document（including any amendments）applies. GB/T176 Method for chemical analysis ofcement GB/T2847 Pozzolanic materials used for cementproduction GB/T8077 Methods for testing uniformity of concreteadmixture GB/T18046 Ground granulated blast furnace slag used for cement andconcrete GB/T50082 Standard for test methods oflong- term performance and durability of ordinaryconcrete GB/T50287 Code for water resources and hydropower engineering geologicalinvestigation GB/T50476 Code for durability of concretestructures DL/T5055 Technical specification of fly ash for use in hydraulicconcrete DL/T5057 Design code for hydraulic concretestructures DL/T5082 Design specifications of hydraulic structures against ice and freezingaction DL/T5100 Technical code for hydraulic concreteadmixtures DL/T5144 Specification for hydraulic concreteconstruction DL/T5150 Test code for hydraulicconcrete DL/T5151 Test code for aggregates of hydraulicconcrete DL/T5180 Classification & design safety standard of hydropowerprojects DL/T5207 Technical specification for abrasion and cavitation resistance of concrete in hydraulicstructures DL/T5330 Code for mix design of hydraulicconcrete DL/T5387 Technical specification for phosphorous slag powder use in hydraulicconcrete DL/T5388 Code of natural building material investigation for hydropower and water resourcesproject 3 Terms The following terms and definitions are applicable to this standard. 3.0.1 cementitious material a general designation for mineral additives which are used as concrete raw materials having cementing properties, such as cement and fly ash, silica fume, granulated blast-furnace slag, phosphorus slag powder, pozzolan, etc 3.0.2 water-cementitious material ratio the ratio of the mass of water to the mass of cementitious materials used in concrete mixture 3.0.3 alkali-aggregate reaction chemical reaction between alkalis in hardened concrete and active minerals of some aggregates, resulting in concrete deleterious expansion, cracking and even damage 3.0.4 total alkali content of concrete a product of mass of raw materials, such as cement, admixtures and additives per unit volume of concrete, and the effective alkali content, in kg/m3 3.0.5 effective alkali content alkali content in concrete raw materials which participates in alkali-aggregate reaction, expressed as an equivalent Na2O, that is, the sum of Na2O content and 0.658 K2O content, in %. 3.0.6 alkali-silica reactive aggregate aggregate with noncrystalline silica or not completely crystallized silica ;alkali-aggregate reaction may occur under certain conditions 3.0.7 alkali-carbonate reactive aggregate microcrystalline dolomite with a specific structure ; alkali-aggregate reaction may occur under certain conditions 4 General Principles 4.0.1 This standard is made to standardize the technical requirements of hydraulic concrete durability and improve the durability design as well as construction, acceptance and quality assessment for hydraulic concrete. 4.0.2 The following basic principles shall be followed to determine technical requirements for hydraulic concrete durability: 1 The durability requirements shall be proposed through special demonstration according to the grade of hydraulic structures, surrounding environment, management conditions for construction and operation, consequences of structure damage and maintenance conditions so as to keep the hydraulic structures safe and reliable, technically advanced, practical and economy and rationality. 2 For gradeⅠhydraulic structures, test and demonstration shall be made in light of the main factors affecting durability. 3 For the structures with durability requirement, technical requirements shall be clear defined for the construction techniques, quality control and operation management. 4 When introduction of new technologies, new-type materials, new techniques and advanced equipment into improve durability, test and demonstration shall be made. 4.0.3 In addition to complying with the requirements in this standard, the durability of hydraulic concrete shall also comply with the specifications in current relevant national standards.