水泥-聚苯乙烯轻质材料的制备及抗冲击性

Preparing and Impact Resistance Properties of Lightweight Material with Cement and Expanded Polystrene

采用半干料压缩成型工艺制备一种水泥-聚苯乙烯轻质材料,通过压缩试验获得其应力-应变曲线,采用高低两种冲击能量测试抗冲击性,利用自制装置测试和计算其对冲击力、冲击能量的吸收比,分析了水泥掺量以及纤维、乳胶粉对冲击力、冲击能量吸收比的影响.结果表明:该水泥-聚苯乙烯材料具有与传统聚苯乙烯混凝土完全不同的破坏形式,不发生脆性破坏,具有较高的韧性,在压缩作用下的应变可达到0.6以上;随着水泥掺量增加,材料对冲击力的吸收比先降低后升高,加入纤维、乳胶粉可提高材料对冲击力的吸收比;材料对冲击能量的吸收比先升高后降低,加入纤维、乳胶粉可提高低水泥掺量下冲击能量的吸收比,但降低了高水泥掺量下的吸收比.具体分析了各种因素的影响规律和作用机理.

A lightweight material with cement and expanded polystyrene （EPS） is prepared by compressing semi-dry materials molding. The stress-strain curve is achieved by compression test. The absorptions of impact force and impact energy during impaction are tested by a self-made device when two different impact energies are applied. Relationship between impact force absorption, impact energy absorption and cement dosage is analyzed. Effect of fiber and latex on absorption is discussed. The results figure out that this material has a different fracture from normal EPS concrete. Upon compression, the material will reach strain of 0. 6 without brittle fracture which represents brilliant toughness. Impact force absorption decreases first and then increaseswith the rising of cement dosage, while adding fiber and latex can lead to higher absorption. Impact force absorption increases first and then decreases with the rising of cement dosage, while adding fiber and latex can lead to higher absorption on low cement dosage but lower absorption on high cement dosage. The influence law and mechanism of various factors are analyzed in detail.