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Soil-Cement Ratio and Curing Conditions as the Factors of Soil-Concrete Strength

机译：土水泥比和固化条件作为土壤混凝土强度的因素

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Soil-concrete is widely used to strengthen the foundation footings, in the construction of roads and railways, as well as for the production of bricks and pavement tiles. One of the most important physical and mechanical properties of soil-concrete is the compressive strength. We carried out a study of soil-concrete strength depending on its curing conditions and percentage of cement. For our study we used loam soil with the plasticity index of I_p = 12.3, Portland cement of type I, ground limestone with the specific surface of 4500 cm~2/g, polycarboxylate based superplasticizer and water for mixing. Curing of samples was carried out in air-humid condition in wet sawdust and also with the thermal-humid treatment in a steam chamber. It is experimentally established that the strength of soil-concrete depends not only on the ratio of clay aggregate and mineral binder, but also on the temperature and humidity conditions of curing. Additives of ground limestone and superplasticizer contribute to increase the compressive strength of soil-concrete. A mathematical model for determining the compressive strength of soil-concrete depending on the percentage of cement and the curing period is developed. This proposed mathematical model is advisable to apply for assessment of the compressive strength of soil-cement massive layer after the urgent repair of under-road pipelines.
机译：土壤混凝土广泛用于加强地基进步，在道路和铁路建设中，以及生产砖和路面瓷砖。土壤混凝土最重要的物理和力学性能之一是抗压强度。根据其固化条件和水泥的百分比，我们对土壤混凝土强度进行了研究。对于我们的研究，我们使用了LOAM土壤，具有I_P = 12.3的可塑性指数，I型型型，地面石灰石，比4500cm〜2 / g的比表面，基于聚羧酸酯基础塑化剂和用于混合的水。样品的固化在湿锯末的空气 - 潮湿状态下进行，并且还具有在蒸汽室中的热湿法处理。实验确定，土壤混凝土的强度不仅取决于粘土骨料和矿物粘合剂的比例，还取决于固化的温度和湿度条件。地面石灰石和超塑性剂的添加剂有助于提高土壤混凝土的抗压强度。开发了一种根据水泥和固化期百分比确定土壤混凝土压缩强度的数学模型。这一提出的数学模型是建议申请评估土壤 - 水泥大量层的抗压强度后的欠路后管道。

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