Lignosulfonates(LS),as of strong retardation,could improve concrete workability and reduce slump loss,yet could also be hazardous to development of earth strength.
木质素磺酸盐(简称木盐)具有较强缓凝作用,可提高混凝土工作性、减少坍落度损失,但不利于早期强度发展。
There are four primary retarding mechanisms of ligonsulfonate:adsorption retardation,complexation retardation,nucleus formation inhibition retardation and deposition retardation.
木素磺酸盐是目前使用最为广泛的普通减水剂之一 ,它与水泥的适应性及缓凝机理一直是人们关注的问题。
Effect of retarding plasticizers to the function of ready-mixed concrete;
缓凝型减水剂对商品混凝土性能的影响
Super-retarding mortar is composed of cement, retarding admixtue and sand in appropriate ratio.
超缓凝砂浆是由水泥、复合缓凝剂和砂经适当配比而成，能在５～４０℃范围内，３０天内不凝结，而在３０天后才开始硬化，并最终达到３０ＭＰａ以上的抗压强度。
1%,strength can\'t improve due to grave retarding.
1%后,由于过度缓凝使混凝土强度严重降低。
Selection of retarder of alkali activated slag cement;
碱-矿渣水泥缓凝物质的选择研究
Its main elements are effective water reducing agent,retarder and air entraining agent.
配制HPC掺用外加剂是最重要的途径,其主要成份是高效减水剂、缓凝剂、引气剂,合理掺用可以取得最佳技术效果,过量掺用或使用不当则会产生负面影响。
In this paper,a wideband retarder AS was developed which is insensitive to temperature within a certain temperature range.
为此,研制了一种在一定温度范围内对温度不太敏感的宽温带缓凝剂AS。
In order to determine the optimum mixture ratio of the retarded concrete,the factors which affect the property of the retarded concrete are studied by lots of experiments on proportional ratio.
通过大量缓凝混凝土配合比试验,研究影响缓凝混凝土性能的各种因素,进而确定出缓凝混凝土的最佳配合比。
In order to discuss the microstructure under slower cooling rate of as-cast AZ91D magnesium alloy,the slow solidification treatment was carried out.
为了探讨AZ91D镁合金在较慢凝固冷却速度下的组织,对其进行了缓慢凝固处理。
In this paper, AZ91D as-cast magnesium alloy was studied by OM, SEM, TEM ,XRD, EDS, which was treated by slow solidification, solution ageing and homogenizing annealing treatments.
为此,本文选择了具有代表性的AZ91D镁合金铸锭,对其进行缓慢凝固处理、固溶时效处理和均匀化退火处理,利用光学显微镜、扫描电子显微镜、透射电子显微镜等观察合金的显微组织,利用X射线衍射仪、X射线能谱仪定性和定量地分析合金及微区成分,并对合金的布氏硬度、微区的显微硬度及抗拉伸、抗压缩性能等进行测试,对合金凝固过程和脱溶析出过程进行分析,探讨这三种方法对消除偏析β相,改善二次β相的析出形态及力学性能的影响。
Study of Using Desulfurization Products from Flue Gas of RCFB as Cement Retarder;
回流式循环流化床锅炉烟气脱硫灰用作水泥缓凝剂的研究
Investigation of cement retarder made of chemically pretreated phosphogypsum;
化学预处理磷石膏用于水泥缓凝剂的研究
Itaconic acid/2-acrylamido-2-methlpropanesulfonic acid (AMPS) copolymer as an oil well cement retarder;
衣康酸/AMPS共聚物作为油井水泥缓凝剂的研究
Circumstance temperature influences the function of retarder for concrete apperantly.
缓凝剂的缓凝效果,受环境温度的影响十分明显。
There is some about that retarders or retarding plasticisers really alter the total heat output or, for that matter, the rate of heat generation.
无疑地，缓凝剂或缓凝塑化剂确实改变了点总放热量或放热速度。
Super-retarding mortar is composed of cement, water, retarding admix and sand blended in appropriate rate .
超缓凝砂浆是由水泥、复合缓凝剂、水和砂经适当配比而形成的。
Some retarders permanently weaken the concrete.
某些缓凝剂对混凝土起长期的弱化作用。
Expermental Research of Auxiliary Plastic Effect of Concrete Retarder;
混凝土缓凝剂辅助塑化效应的试验研究
Researches of RCC Super Retarding Compound Additive;
碾压混凝土坝超缓凝复合外加剂的试验研究
Effect of Set-retarders and Early-age Curing on Compressive Strength of Concrete;
缓凝剂和早期养护对混凝土性能的影响
Effects of concrete lasting properties by compounding polycarboxylic type superplasticizer with retarders
聚羧酸系与缓凝剂复合对混凝土耐久性的影响
Study on effects of concrete performance by compounding polycarboxylic type superplasticizer with retarders
聚羧酸系与缓凝剂复合对混凝土性能影响研究
Research on the Optimum Amount of Retarder and Water Reducing Agent for Slag Cement Concrete
矿渣水泥混凝土缓凝剂和减水剂最佳掺量研究
The retarding jetting construction technology adopted in composite bridge concrete interface
复合桥面混凝土界面采用缓凝水冲施工技术
Evaluation and Application of the SDH Retarders for Oil Well Cement;
SDH油井水泥缓凝剂的评价及应用
Study on Semi-Dry Flue GAS Desulfurization ASH as Cement Retarder
半干法脱硫灰用作水泥缓凝剂的研究
Study on a Novel Retarder CMPAI Used in HTHP Oil Well
新型油井水泥高温缓凝剂CMPAI的研究
The technology of super concrete retarder is a new research interest in concrete technology.
混凝土超缓凝剂技术是当今混凝土技术的一个新的研究方向。
Meanwhile, the influences of Super Retarder (SR) and Air Entraining Agent (AEA) on concrete workability,mechanical properties are studied here.
同时还研究了超缓凝剂、引气剂对混凝土工作性、力学性能的影响。
Influence of superplasticizers and retarding agents compositions on concrete carbonation resistance
聚羧酸高效减水剂与缓凝剂复合对混凝土耐久性能的影响
Inhibition Effect of a New-type Inhibitor on the Steel Bar in Concrete
一种新型缓蚀剂对混凝土中钢筋的缓蚀作用