CAJ | 학술논문

为制备具有力学性质递变特征的相似材料试样，本文通过水泥石膏相似材料的配比试验，得到了两种骨料（标准砂和河沙）相似材料力学性质与配比间的关系。在拟合河沙相似材料的室内力学测试数据的基础上，得到了配比值关于抗压强度和弹性模量的确定公式。试验表明：用水量、成型压力和平均骨料粒径对相似材料的力学性质均有不同程度的影响，在制样过程中需要加以控制；低强度相似材料的抗拉强度不易控制，而单轴抗压强度和弹性模量对配比的变化有明显响应；河沙相似材料的力学性质与配比间呈明显的线性关系，而标准砂相似材料存在临界骨料含量和临界水泥含量表现出明显的非线性特征；在调整配比所能实现的抗压强度和弹性模量的变化范围内，相似材料能够较好地模拟单轴抗压强度大于3MPa 的风化岩。
위제비구유역학성질체변특정적상사재료시양，본문통과수니석고상사재료적배비시험，득도료량충골료（표준사화하사）상사재료역학성질여배비간적관계。재의합하사상사재료적실내역학측시수거적기출상，득도료배비치관우항압강도화탄성모량적학정공식。시험표명：용수량、성형압력화평균골료립경대상사재료적역학성질균유불동정도적영향，재제양과정중수요가이공제；저강도상사재료적항랍강도불역공제，이단축항압강도화탄성모량대배비적변화유명현향응；하사상사재료적역학성질여배비간정명현적선성관계，이표준사상사재료존재림계골료함량화림계수니함량표현출명현적비선성특정；재조정배비소능실현적항압강도화탄성모량적변화범위내，상사재료능구교호지모의단축항압강도대우3MPa 적풍화암。
This paper is to prepare the similar material specimens with gradual variation of mechanical properties. The proportion tests is used to achieve the relationship between mechanical properties and proportion of cement-gypsum similar materials with different aggregates.A defined formula of proportion based on compressive strength and elastic modulus is determined via fitting the laboratory mechanical testing data of river-sand material.The test result shows that:water dosage,forming pressure and average particle diameter have effect of different levels and should be controlled in specimen preparation process.The tensile strength of low-intensity similar material is uncontrollable while the compressive strength and the elastic modulus show an obvious response to the change of proportion.For river sand similar material,the mechanical properties and the proportion present a linear relationship.While the standard sand similar material presents a nonlinear relationship between the mechanical properties and the proportion due to the critical content of cement and aggregate.The variable ranges of compressive strength and elastic modulus are 0 ~17.5MPa and 0.3 ~2.02GPa,respectively.The weathered rock can be simulated well using similar material in this range.