这些模具应由不会与含有硅酸盐水泥的混凝土发生反应的材料制成。
They shall be made of materials that do not react with concrete containing Portland cement.
以硅粉取代部分普通硅酸盐水泥，对混凝土性能改善效果最好。
By substituting silica powder for ordinary Portland cement, the performance of the concrete can be best improved.
研究结果表明，在硅酸盐水泥中掺加矿粉、粉煤灰、硅灰等混合材料可以改善海工混凝土的综合性能。
The results showed that adding slag powder, fly ash, silica fume to Portland cement can improve the comprehensive performance of marine concrete.
上述研究结果对于采用普通硅酸盐水泥生产超轻泡沫混凝土具有一定的指导作用。
The results of the study had a role of guiding the production of product the super-ligh foamed concrete with ordinary Portland cement.
大体积混凝土施工时常选用水泥水化热较低的矿渣硅酸盐水泥等以利于混凝土温升控制。
For massive concrete construction, the low hydration heat cement like the slag Portland cement is often used to facilitate temperature rise control in the concrete.
混凝土采用普通硅酸盐混凝土，施用抗硫酸盐水泥；钢布局粉刷。
Portland cement concrete shall be, and sulfate resistant cement; steel structure is painted with protection coat.
在普通硅酸盐水泥中掺入外掺剂，是制备水泥混凝土路面快速修补材料最简便的方法。
It is the simplest way in which the material used for rapid repairing cement bound roads can be made that admixtures are added into ordinary Portland cement.
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.
在调查分析海工混凝土工程实例的基础上，试验研究了硅酸盐水泥中掺入矿粉、粉煤灰、硅灰等混合材料对海工混凝土性能的影响。
On the basis of survey of many Marine concrete constructions, the effects of adding slag powder, fly ash, silica fume to Portland cement on the performances of Marine concrete were researched.
总结分析了大体积混凝土易产生裂缝的原因及应对措施，指出使用低热硅酸盐水泥可有效改善大体积混凝土的抗裂性能。
We summarize the causes and countermeasures of massive concrete cracking, and propose that crack resistance of massive concrete can be effectively improved by low-heat Portland cement.
总结分析了大体积混凝土易产生裂缝的原因及应对措施，指出使用低热硅酸盐水泥可有效改善大体积混凝土的抗裂性能。
We summarize the causes and countermeasures of massive concrete cracking, and propose that crack resistance of massive concrete can be effectively improved by low-heat Portland cement.
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