中文摘要：

通过3个系列下15组塑性混凝土应力一应变全曲线试验，研究了膨润土及水泥用量等因素对其变形及破坏特征的影响。3个系列塑性混凝土的水泥用量分别为80、100和150kg／m^3，每个系列下膨润土掺量分别为水泥用量的0、30％、60％、100％和120％。结果表明，水泥用量对塑性混凝土体积最大压缩量（抗裂性能）影响很小，但对其弹性模量、强度有决定性的影响。在水泥用量相同的条件下，增加膨润土掺量可显著提高塑性混凝土的抗裂性能。随着膨润土掺量增加，塑性混凝土体积最大压缩量显著增加，而弹性模量和强度则明显减小，但掺量超过一定范围后，影响程度大大降低。通过不掺膨润土、增大用水量等途径，可以配制出具有塑性混凝土类似性能的混凝土，但其抗裂性能较差。塑性混凝土配制中水泥用量宜采用80～150kg／m3，膨润土掺量为水泥用量的20％～60％。

英文摘要：

The effect of fine materials on the plastic concrete deformation was investigated v/a the basic experiments with 15 mixed plastic concrete samples. The cement contents in three series plastic concrete samples examined are 80,100 and 150 kg/m3 , respective- ly, and the ratio of bentonite to cement is 0,0. 3,0. 6,1.0 and 1.2 in each series, respectively. The results show that the cement con- tent has a dominant influence on the elastic modulus and strength, but it has little influence on the maximum compressive volume. The maximum compressive volume increases and the elastic modulus and strength decrease with bentonite at the same cement content. How- ever, the effect of cement content is slight when the ratio of bentonite to cement exceeds a certain range. The concrete prepared can sat- isfy the basic requirement of plastic concrete v/a the increment of water content without bentonite, but it has the less maximum com- pressive volume and the less crack resistance. The cement content is 80--150 kg/m3 , and the ratio of bentonite to cement is 20%-- 60% in the mixes of the plastic concrete for the proper mechanical properties.