经过多年的侵蚀，水泥石化了。
试验结果表明，粉煤灰等量取代部分水泥，可以有效解决蒸汽养护混凝土抗氯离子侵蚀能力不够的问题。
Results indicated that fly-ash substituting same amount of cement can effectively solve the problem of insufficient anti-chloride-corrosion ability of steam cured concrete.
这两种特殊水泥涂层均适用于污水管道用球墨铸铁管的内防腐，提高抵抗污水中酸碱成分的侵蚀能力。
The two special cement coatings are applicable to sewage pipeline internal corrosion for ductile iron pipe, improve the ability to resist the erosion of acid components in sewage.
混凝土的侵蚀实质是水泥石的侵蚀，而造成混凝土宏观破坏。
The corrosion essence of the concrete is that corrosive materials attack its hardened cement paste and thus destroy the concrete as a whole.
研究了中性钠盐碱矿渣水泥在酸性溶液、硫酸盐溶液和海水中的抗化学侵蚀性能。
The resistance to chemical attack of NSAAS cement in acid solution, sulfate solution, sea water was studied.
混凝土设计中存在最佳水泥用量，此用量时矿渣水泥混凝土抗侵蚀性最强。
In concrete design, there was an optimum cement content, in which the slag concrete had the best corrosion resistance.
工程结构中的水泥砂浆在使用过程中经常会受到侵蚀性离子的作用，致使水泥砂浆性能劣化强度降低。
Cement mortar in engineering structures is often subjected to the effect of erosive ions and thus performance of cement mortar will deteriorate.
另一方面使水泥浆具有防窜性，减轻了地层流体对水泥环的侵蚀。
It can reduce cement slurry filtration, provide a channeling-preventing effect and mitigate corrosion of formation fluids on cement ring.
防治海水对水泥土侵蚀的试验研究。
研究了这些材料对碱矿渣水泥的强度、抗化学侵蚀性能以及抑制泛碱的作用。
Experimental results show that the replacement of slags by pozzolan can reduce the mechanical strength of AASC, but it can be obviously favorable for the resistance to chemical corrosion and t.
硫铝酸盐水泥比硅酸盐水泥具有早强、高强、抗渗、耐侵蚀、抗冻、微膨胀等性能。
Sulphoaluminate cement has better properties than Portland cement, high strength, fast hardening, impermeability, corrosive resistance, frost resistance, expansive property and so on.
耐化学腐蚀试验表明新型碱矿渣水泥具有比普通硅酸盐水泥更优的抗化学侵蚀性；
Test results on resistance to chemical attack indicate that NASC possesses more excellent anti-chemical attacking property than that of Ordinary Portland Cement.
石膏的形成导致硫酸盐侵蚀水泥基材料产生膨胀开裂。
The gypsum formation causes the expansion of materials based on cement exposed to sulfate bearing solutions.
采用经加工处理的石英集料，可以提高水泥砂浆的抗硫酸盐侵蚀性能。
The mortar made with treated quartz sand can improve the function of the sulfate attack resistance of the interface structure of mortar.
由于水泥在途中非常易于受潮或遭雨淋而变 质，因此务必采取必要的防护措施使得包装能 够防潮和免遭雨水侵蚀。
Please take necessary precautions that the packing can protect the goods from dampness or rain, since cement is liable to be spoiled by damp or water in transit.
结果表明：与水泥相比，碱激发粉煤灰胶凝材料具有良好的抗硫酸侵蚀性、湿胀小、干缩大。
The results showed that alkali-activated fly-ash cementing material has good sulphuric acid resistance and low bulking factor and high drying shrinkage against ordinary Portland cement.
笔者对水泥混凝土硫酸盐侵蚀的机理、影响因素进行了分析与探讨，并提出了防止混凝土硫酸盐侵蚀的一些方法措施。
The mechanism and influential factor of sulfate attack of concrete are analyzed and investigated, and some avoiding measures are proposed.
该水泥烧成温度低、凝结时间快、早期和后期强度都高、耐侵蚀性能好。
The cement has advantages of low sintering temperature, fast coagulation time, high initial and later strength and good corrosion resistance.
研究了粉煤灰、矿渣微粉复合双掺时对水泥砂浆的强度以及抗模拟酸雨侵蚀性能的影响。
This paper concentrates on the influence of the mixture of fly ash and slag powder on cement mortar strength and resistance to simulating acid rain.
研究了粉煤灰、矿渣微粉复合双掺时对水泥砂浆的强度以及抗模拟酸雨侵蚀性能的影响。
This paper concentrates on the influence of the mixture of fly ash and slag powder on cement mortar strength and resistance to simulating acid rain.
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