轻质超高韧性水泥基复合材料试验研究

3.浙江理工大学 建筑工程学院，浙江 杭州  310018；4.浙江大学 高性能建筑结构与材料研究所，浙江 杭州  310058）

    摘要：通过掺入玻化微珠配制轻质超高韧性水泥基复合材料，研究了玻化微珠掺量对复合材料密度、强度、弹性模量及拉伸特性的影响。结果表明，随着玻化微珠掺量的增加，超高韧性水泥基复合材料的密度逐渐减小，抗压强度和拉伸弹性模量逐渐降低，极限抗拉强度先降低后提高，极限抗拉应变逐渐增大。当玻化微珠掺量为胶凝材料质量的23.5%时，轻质超高韧性水泥基复合材料密度为1.34g/cm3，抗压强度为29.84 MPa、拉伸弹性模量为9.3 GPa，极限抗拉应变4.81%，极限抗拉强度4.03 MPa。

    关键词：轻质超高韧性水泥基复合材料；直接拉伸；应变硬化；玻化微珠

    中图分类号：TU528        文献标识码：A        文章编号：1001-702X（2018）07-0001-04

 

Experimental research on lightweight ultra high toughness cementitious composite

WU Pu1，SHEN Yuan2，ZHU Xiaojun2，LI Hedong3，4

（1.The Architectural Design and Research Institute of Zhejiang University Co. Ltd.，Hangzhou 310012，China；

2.Hangzhou Yuhang District Traffic Project Management Co. Ltd.，Hangzhou 311100，China；

3.School of Civil Engineering and Architecture，Zhejiang Sci-Tech University，Hangzhou 310018，China；

4.High-Performance Building and Material Institute，Zhejiang University，Hangzhou 310058，China）

   Abstract：In this research，glazed hollow bead was introduced to develop lightweight ultra high toughness cementitious composite and the influence of the dosage of glazed hollow bead on the density，strength，elastic modulus and elongation characteristics of the composite is studied. With the increase of dosage of glazed hollow bead，the test results show that the density，compressive strength and tensile modulus decrease while the ultimate tensile strain increase gradually，ultimate tensile strength increases first and then increases. Finally，a lightweight ultra high toughness cementitious composite was developed with the glazed hollow bead to binder ratio（by weight） of 0.235，and the corresponding density，compressive strength，tensile modulus，ultimate tensile strain and ultimate tensile strength are 1.34 g/cm3，29.84 MPa，9.3 GPa，0.0481 and 4.03 MPa，respectively.

    Key words：ultra high toughness cementitious composite，direct elongation， strain hardening， glazed hollow bead