| 摘要: |
| 通过数字图像相关技术（DIC）,对掺加了粉煤灰、矿粉的水泥砂浆试件在不同养护龄期下的抗拉强度及抗拉弹性模量进行了测试,并研究了矿物掺和料对砂浆试件抗拉强度、抗拉弹性模量的影响以及极限抗拉强度与抗拉弹性模量随养护龄期的变化规律.结果表明：随着养护龄期的延长,砂浆试件极限抗拉强度和抗拉弹性模量线性增加；矿粉与粉煤灰的掺入延缓了胶凝体系的水化速率,降低了早龄期砂浆的极限抗拉强度和抗拉弹性模量. |
| 关键词: 砂浆 早龄期 数字图像相关技术 抗拉弹性模量 |
| DOI：103969/j.issn.1007 9629202004002 |
| 分类号: |
| 基金项目:山东省重点研发计划（2018GHY115020）；国家自然科学基金重点项目（U1806225）；国家自然科学基金青年科学基金资助项目（51708314）；泰山学者工程专项经费资助项目(TS20190942) |
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| Study on Tensile Strength and Elastic Modulus of Early Age Mortar |
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SHAO Shuangshuang1, JIN Zuquan1, YU Yong1, ZHAO Jizeng2
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1.College of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China;2.Qingdao West Coast Rail Transit Co., Ltd., Qingdao 266500, China
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| Abstract: |
| The effects of mineral admixture on tensile strength and tensile modulus of the mortar specimens and the development of ultimate tensile strength and tensile modulus of elasticity with curing age were studied by digital image correlation technology(DIC). The test results show that with the increase of curing age, the ultimate tensile strength and tensile elastic modulus of mortar specimens all increases linearly. At the same curing age, the hydration degree of cementitious systems is reduced by the incorporation of ground granulated blastfurnace slag（GGBS） and fly ash, so ultimate tensile strength and elastic modulus of the mortar specimens at early age are also reduced. |
| Key words: mortar early age digital image correlation tensile elastic modulus |
