heat evolution meaning in English
放[发]热
放热
热析出
Examples
- There is an old saying in our field - " no dam is not crackable " . the crack is mainly because of the bad dilation after " alkali - aggregate reaction " , the temperature traverse inside and outside the concrete with the happening of heat evolution and the shrink of volume due to the cooling of concrete
水电行业有句“无坝不裂”的俗话，产生裂缝的原因主要有“碱集料反应”造成的破坏性膨胀，水泥水化过程中放出的热量出现的混凝土内外温度梯度和水泥石硬化后由于后期降温发生的体积收缩等造成。 - It is indicated that the hydration process of cement - based materials with slag , fly ash and silica fume is different in some degree from that of neat cement because of the difference in mineral structure and hydration mechanism . the periods of accelerating , decelerating and terminating are prolonged and hydration reaction decelerates . the second peak of rate curve of the heat evolution could be divided into two small peaks , which are contributed to the hydration of clinkers and mineral mixtures at the temperature of 30 but when temperature comes to 50 , the two small peaks combine into one and the reaction accelerates
结果表明，与硅酸盐水泥相比，由于矿物掺合料与水泥熟料在活性和水化机理上的差异，水化历程有较大的改变：多组分体系诱导期、加速期和衰减期延长，水化反应速率明显降低；低温时，水化放热速率曲线上的第二放热峰细化成分别对应于熟料和矿物掺合料水化的两个小峰；高温时，反应速率加快，双峰合并；进一步研究发现，掺合料的种类与掺量对水化历程也有较大的影响；建立了适用于多组分水泥基材料不同水化阶段的水化动力学方程。