Question

求英语高手翻译一下！！急求！！

For structure inwhich a reduction in cracking is of particular importance, such as bridgedecks, pavement salbs, and liquid storage tanks, the use of expansive cementconcrete is appropriate. Shrinkage-compensating cement is constituted and proportionedsuch that the concrete will increase in volume after setting and duringhardening. Expansive cement is produced by adding a source of reaction aluminateto ordinary Portland cement; approximately 90percent of shrinkage-compensatingcement is made up of the constituents of conventional Portland cement. Of thethree main types of expansive cement produced, only type K is commercially availablein the US; it is about 20 percent more expensive than ordinary Portlandcement(Ref 2.43). The usual admixturescan be used in shrinkage-compensating concrete, but trial mixes are necessarybecause some admixtures, particularly air-entraining agents, are not compatiblewith certain expansive cements

b. Effect of Temperature Change
Like most other material, concrete expands with increasingtemperature and contracts with decreasing temperature. The effect of such volumechanges are similar to those caused by shrinkage, temperature contraction canlead to objectionable cracking, particularly when superimposed on shrinkage.

Answer 1

减少开裂结构是特别重要的，如桥面，人行道，和储液罐，膨胀水泥混凝土的使用是适当的。补偿收缩水泥组成的比例，混凝土会增加量设定后，再硬化。膨胀水泥加入铝酸反应源于生产普通波特兰水泥；约90%的收缩补偿水泥是传统的波特兰水泥的成分。三种主要类型的膨胀水泥生产，只有K型的商业在美国；它大约比普通硅酸盐水泥高百分之20的价格（参考文献2.43）。常用的外加剂，可用于补偿收缩混凝土，但试验混合物必不可少的是一些外加剂，特别是引气剂，不按照一定的规律膨胀水泥。
B.温度变化的影响
像大多数其他材料，混凝土随着温度的降低，温和舒展。这种体积变化的影类似于那些引起的收缩，特别是当上叠加收缩、温度收缩裂缝出现的。

Answer 2

对于结构,减少开裂是特别重要的,如bridgedecks,路面salbs,液体储罐,使用膨胀cementconcrete是合适的。补偿收缩水泥是构成和proportionedsuch,混凝土会增加体积和duringhardening后设置。 膨胀水泥是由添加一个源的反应aluminateto普通硅酸盐水泥;大约90%的shrinkage-compensatingcement由传统的硅酸盐水泥的成分。 的三个主要类型的膨胀水泥生产,只有K型商业有效范围美国;它是关于比普通Portlandcement贵20%(参考2.43)。通常的admixturescan用于补偿收缩混凝土,但试验混合是necessarybecause一些外加剂,特别是引气代理,不是compatiblewith某些膨胀水泥b。温度效应的影响ChangeLike大多数其他材料,混凝土膨胀increasingtemperature和合同与降低温度。 这样的效果volumechanges类似于所引起的收缩、温度收缩中发生,特别是当有异议的开裂,叠加在收缩。