磷石膏用作水泥缓凝剂时，其中含有的杂质对水泥的性能产生不利影响，因此使其应用受到限制。
Impurities from phosphogypsum had deleterious effect on the property of cement when used as cement retarder, which caused limited application.
杂质对水泥性能影响不大，不经预处理作水泥缓凝剂，其性能与采用天然石膏的水泥相当。
The properties of cement with titanium gypsum are similar to those of Portland cement with natural gypsum.
简要叙述了磷石膏利用的基本概况，介绍了几种各具特色的磷石膏制水泥缓凝剂的生产工艺流程，以及作者的实验流程。
The application status of phosphogypsum is presented. Some processes of producing cement retarder by phosphogypsum including author's experimental process are introduced.
深度越大，为完成注水泥作业所需的时间越长，而且由于升高的温度对水泥浆凝固过程的影响，因而对水泥浆缓凝的需求也越高。
The need for cement retardation increases with depth due to the greater time required to complete the cementing operation and the effect of increased temperature on the cement-setting process.
试验表明，该新工艺可生产出合格水泥缓凝剂产品，并且能耗低，成本低，无二次污染。
The trials show the cement retarding agent acceptable at lower energy consumption, lower cost and no secondary pollution.
方法利用XRD和SEM等微观手段，对掺入超缓凝剂水泥砂浆的缓凝性能进行了测试和表征。
The retarding properties of cement paste with the super-retarding agent have been characterized and analyzed by means of XRD and SEM.
提出配置缓凝型减水剂应综合考虑缓凝时间要求、坍落度损失和水泥品种。
It proposed that considerations on retarding time, slump loss and cement kinds are important for retarding plasticizer matching.
研制了一种以无机聚合物（水玻璃）为速凝剂、以磷酸盐为缓凝剂配制而成的CWP水泥复合浆液。
This paper expresses a kind of CWP composite cement grout made up of water, cement, water glass as accelerant and phosphate as retarder.
这些性能包括水泥浆的流变性能、稳定性、稠化时间、失水量和水泥石的抗压强度等，并且将SDJ2与自制缓凝剂SDH - 2进行了配方试验。
The properties include rheology, stabilization, thicken time, fluid loss of grout and pressure strength of cement etc, and SDJ2 is tested with SDH-2 retarder.
研究了使用双快水泥和缓凝剂配制混凝土的凝结硬化性能和强度性能。
This paper studied the setting and hardening property and strength property of concrete prepared by fast setting and hardening cement and retarding admixture.
在水泥中加入磷石膏做缓凝剂，对凝结时间影响较大，但对强度影响不太明显；
Phosphorous gypsum makes cement condensation time prolonged, while give no evidence influence on cement strength.
介绍了一种新型油井水泥缓凝剂QR- 300c的应用性能和在吐哈地区3口深探井油层套管固井中的应用情况。
The paper introduces the field performance of a new kind of oil well cement retarder QR-300C, and its application in production string cementing on three deep exploratory Wells at Tuha oil field.
实验分析了不同电压、不同水泥品种、缓凝剂对电渗滤水混凝土性能的影响。
The experimental results indicate that ZnO retarder can increase the filtering velocity markedly, which ensures the strength and durability of filtering concrete effectively.
SEM图像表明，掺超缓凝剂的水泥硬化结构更加致密。
SEM photographs indicate that the microstructure of hardening cement with super-retarding agent is more compact.
掺加不同种类的缓凝剂均不同程度促进高效减水剂提高减水作用，并且对减水作用的提高程度反映了该缓凝剂与萘系高效减水剂和水泥三者的适应性差别。
By adding different retarders, the water reducing effect is improved in varied degrees, which reflects the difference of its adaptability to naphthalene water-reducing agent and cement.
热电厂脱硫石膏与天然二水石膏相似，适合作水泥缓凝剂。
The FGD gypsum similar to the natural gypsum in common characteristics, and is adequately used as cement retarder.
通过选用柠檬酸、白糖、葡萄糖酸钠为矿渣硅酸盐水泥的缓凝剂，测定了不同温度下水泥的凝结时间，分析了温度对混凝土缓凝剂最优掺量的影响规律。
The cement setting time at different temperatures has been measured through choosing citric acid, sugar and sodium gluconate as the retarders of iron Portland cement.
综述了磷酸镁骨水泥的合成工艺、理化特性、反应机理、缓凝机理及水化产物组成。
In this paper, the research on MPC is reviewed involving its preparation, physicochemical properties, hydration product components and mechanism of reaction and retarding.
目前研究显示磷石膏经预处理后，凝结时间和强度能满足使用要求，但并不能说明磷石膏作为缓凝组分就能与水泥熟料很好适应。
Condensation time and strength of cement with pretreated phosphogypsum could match the standard, but the compatibility of phosphogypsum with clinker was quite different.
研究结果表明：用化工石膏作缓凝剂，水泥性能符合国家标准规定。
Results show that, as the chemical gypsum was used as retarder, the cement properties can meet the requirements of the national standard.
脱硫石膏作水泥缓凝剂必须低温烘干。
The FGD gypsum should be dried at low temperature for the use of cement retarder.
水泥内加入缓凝剂了吗？
论文分别研究了木钙、糖钙、酒石酸、焦磷酸钠和蔗糖共五种常用缓凝剂对水泥净浆凝结时间、混凝土凝结时间及强度的影响。
The effects of five common set-retarders on setting time of cement paste and concrete and strength of concrete are studied.
通过大量的化验室小磨配比试验，研究了脱硫石膏代替天然二水石膏作水泥缓凝剂对普通水泥、矿渣水泥各项性能的影响。
After many grinding mixture ratio tests in laboratories, the paper studies the effect on ordinary cement and slag cement of desulfurized gypsum as cement retarder, instead of raw gypsum.
针对固态碱组分碱矿渣水泥的速凝问题，通过大量实验找出了适用于这种新型水泥的缓凝剂，同时讨论了固态碱组分碱矿渣的缓凝机理，提出了合理可行的技术路线。
The problem of accelerated setting of SAAS cement was solved by a series of tests. Retarding mechanism of the new cement was discussed and rational technical method was proposed.
这种固化石膏可以用于水泥缓凝剂和建筑石膏的原材料。
The cured gypsum can be used as the raw material of a cement retarder and building gypsum.
葡萄糖酸钠作为一种良好的缓凝剂，对水泥也有较显著的塑化效果。
The sodium gluconate has served as one kind of good retarder, and also has the excellent plasticization effect to the cement.
试验表明，该新工艺可生产出合格水泥缓凝剂产品，并且能耗低，成本低，无二次污染。
The trials show the cement retarder acceptable at lower energy consumption, lower cost and no secondary pollution.
试验表明，该新工艺可生产出合格水泥缓凝剂产品，并且能耗低，成本低，无二次污染。
The trials show the cement retarder acceptable at lower energy consumption, lower cost and no secondary pollution.
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