The result of experiments shows that potassium sulfate can increase the strength of anhydrite considerably,when Portland cement is added there is a great improvement on the strength and softening coefficient an.
研究了这些组分对天然硬石膏力学性能及耐水性能的影响规律,实验结果表明,硫酸钾对强度提高显著,硅酸盐水泥对强度与软化系数均有很大的改善作用,而半水石膏对强度与软化系数也有一定程度的影响。
A kind of mould gypsum was prepared to eliminate the weakness of low softening coefficient as well as short service life of β-CaSO_4·0.
试验制备一种混合模具石膏 ,克服了单独使用 β型半水石膏做模具石膏时软化系数低寿命短和单独使用α型半水石膏时吸水率低的缺陷 。
The softening coefficient of gypsum/expanded perlite composite wall material is increased (over 0.
通过添加自制防水剂石蜡-松香乳液使石膏膨胀珍珠岩复合墙体材料的软化系数得到提高(可达0。
The result shows that early maintenance conditions benefit the materials,the intensity of the cementitious materials grows faster,soften coefficient increased,so early maintenance should be strengthened.
指出石膏胶凝材料的水化速度取决于周围环境的温度、湿度和时间,该试验用不同的养护方法对石膏胶凝材料的各项物理性能进行了研究,结果表明,早期养护条件好,该胶凝材料的强度增长较快,软化系数有所提高,从而使石膏制品得到广泛应用。
Rod parameter,soft coefficient and stress triaxiaty,are the commonly-used stress state parameter in studying the deformation and fracture of metal material.
罗德参数、软性系数和应力三维度是研究金属材料变形、破坏时常用的应力状态参数,分析从三向压缩到三向拉伸不同应力状态下各参数值的变化,得出:应力三维度值从小向大有规律地变化,罗德参数和软性系数则不能分析裂纹体、无裂纹体金属材料断裂破坏的试验结果;同时认识到构件中,体积变形较大、形状变形较小处是材料发生脆断、准脆断的断裂萌生点,此危险点正是应力三维度有较大值处。