In this experimental work, mechanical and microstructural properties of calcined diatomite powder (CDP) modified high strength mortars (HSMs) at ambient and high temperatures were researched. In the HSM mixtures, Portland cement was replaced with CDP at ratios of 0%, 5%, 10%, 15% and 20%. Several experiments regarding the hardened properties were carried out at 14, 28, 56 and 90 days at the ambient temperature of 25 °C. HSMs were heated up to high temperatures of 400 °C to 1000 °C at the age of 56 days, separately. Then, high temperature resistances of HSMs were quantified in terms of the residual hardened properties and the changes in the microstructural properties after heating. The residual performance was found to be higher in the HSMs modified with CDP than in the reference HSM (R-HSM) which was made 0% CDP. Based on the test results, it was seen that the HSM modified with 15% CDP (15CDP-HSM) exhibited the highest mechanical properties at ambient and high temperatures.

在这项实验工作中，研究了煅烧的硅藻土粉末（CDP）改性的高强度砂浆（HSM）在环境和高温下的力学和微观结构性能。在HSM混合物中，波特兰水泥以0％，5％，10％，15％和20％的比例替换为CDP。在25°C的环境温度下于14、28、56和90天进行了一些有关硬化性能的实验。将HSM分别在56天的年龄加热到400°C至1000°C的高温。然后，根据残留的硬化性能和加热后显微组织性能的变化，对HSM的高温耐受性进行了量化。发现用CDP修饰的HSM的残余性能要比参考HSM（R-HSM）的高，后者的CDP为0％。根据测试结果，