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本文从理论上对爱因斯坦的粘度方程进行了修正,使之适用于“水-水泥”系统,修正以后的粘度方程为η_r=1+[kk_1C_v]~(K_2) ,将该方程进行数学处理并结合实验曲线求出方程中的常数 k、k_1和 k_2。根据常数的物理意义首次推算出水泥表面吸附水层近似厚度。进而讨论了吸附水和自由水对“水-水泥”体系中流变性能的影响,并结合Polanyi 势能理论研究了减水剂的作用机理,指出减水作用的原因之一是水泥表面吸附水量的减少,从而增加了体系的自由水量。
In this paper, Einstein’s viscosity equation is modified theoretically to make it applicable to the “water-cement” system. The modified viscosity equation is η_r=1+[kk_1C_v]~(K_2) and the equation is mathematically processed. In combination with the experimental curve, the constants k, k_1, and k_2 in the equation are found. According to the physical meaning of the constant, the approximate thickness of the adsorbed water layer on the cement surface was first calculated. The effects of adsorbed water and free water on the rheological properties of the “water-cement” system were discussed. The Polanyi potential theory was used to study the mechanism of the water-reducing agent. One of the reasons for the water-reducing effect was the decrease in the amount of adsorbed water on the cement surface. , thereby increasing the amount of free water in the system.