Dvorkin Leonid, Zhitkovsky Vadim, Makarenko Ruslan, Ribakov Yuri
Institute of Civil Engineering and Architecture, National University of Water and Environmental Engineering, 33028 Rivne, Ukraine.
Department of Civil Engineering, Ariel University, Ariel 40700, Israel.
Materials (Basel). 2023 Mar 3;16(5):2075. doi: 10.3390/ma16052075.
The paper deals with the effectiveness of various types of polymers (naphthalene formaldehyde, polycarboxylate, and lignosulfonate) as superplasticizers of concrete mixtures based on low-clinker slag Portland cement. Using the mathematical planning experimental method and statistical models of water demand of concrete mixtures with polymer superplasticizers, as well as concrete strength at different ages and under different curing conditions (normal curing and after steaming) were obtained. According to the models, the superplasticizer's water-reducing effect and relative change in concrete strength were obtained. The proposed criterion for evaluating the effectiveness and compatibility of superplasticizers with cement takes into account the water-reducing effect of the superplasticizer and the corresponding relative change in concrete strength. The results demonstrate that the use of the investigated superplasticizer types and low-clinker slag Portland cement allows for achieving a significant increase in concrete strength. The effective contents of various polymer types, which allow the achieving of concrete strengths from 50 MPa to 80 Mpa, has been found.
本文研究了萘系、聚羧酸系和木质素磺酸系等各类聚合物作为基于低熟料矿渣硅酸盐水泥的混凝土混合物高效减水剂的有效性。采用数学规划试验方法，建立了含聚合物高效减水剂的混凝土混合物需水量统计模型，以及不同龄期和不同养护条件（标准养护和蒸养）下的混凝土强度模型。依据这些模型，得出了高效减水剂的减水效果及混凝土强度的相对变化情况。所提出的用于评估高效减水剂与水泥有效性和相容性的标准，考虑了高效减水剂的减水效果以及混凝土强度相应的相对变化。结果表明，使用所研究的高效减水剂类型和低熟料矿渣硅酸盐水泥可显著提高混凝土强度。已找到各类聚合物的有效用量，其能使混凝土强度达到50MPa至80MPa。
