实现高强度海水珊瑚骨料混凝土的配合比设计

王振波; 刘伟康; 韩宇栋; 丁小平; 武浩东

doi:10.13204/j.gyjzG20082507

实现高强度海水珊瑚骨料混凝土的配合比设计

doi: 10.13204/j.gyjzG20082507

1. 中国矿业大学(北京) 力学与建筑工程学院, 北京 100083;
2. 中冶建筑研究总院有限公司, 北京 100088

基金项目:

国家自然科学基金资助项目（51808545）；北京市科技新星计划资助项目（Z201100006820024）；中冶建筑研究总院有限公司重大课题（YCK2017Ky01）。

详细信息

作者简介:
王振波,男,1989年出生,博士,副教授。

通讯作者:
韩宇栋,hanyudong@cribc.com。

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出版历程
- 收稿日期: 2020-08-25
- 网络出版日期: 2021-10-27

MIX PROPORTION DESIGN OF HIGH-STRENGTH SEAWATER CORAL AGGREGATE CONCRETE

1. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
2. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

摘要

摘要: 为实现高强度海水珊瑚骨料混凝土（SCAC），综合考察总胶凝材料用量、珊瑚石最大粒径、固盐剂掺量、单方用水量、砂率等关键配合比参数的影响，通过3，7，28 d龄期下的立方体抗压强度测试，探究不同配合比SCAC的抗压强度发展规律。结果表明：在保证70%就地取材率的前提下，胶凝材料用量和单方用水量对SCAC强度的影响规律与普通混凝土类似，结合增加胶凝材料用量和降低单方用水量的方法可将28 d抗压强度提升至58 MPa。掺量适当的固盐剂能够有效放缓SCAC的早期强度发展，并为长龄期的强度增长提供保障。降低骨料最大粒径可提升SCAC的抗压强度，但其影响程度随龄期延长而逐渐减小。调增砂率带来的强度增长在低水胶比的配比中效果显著，但砂率需控制在合理范围内。
- 海水珊瑚骨料混凝土 /
- 配合比设计 /
- 高强度 /
- 就地取材率
Abstract: Aiming at a high-strength seawater coral aggregate concrete (SCAC),the paper thoroughly examined the effects of several key mix parameters,such as the total cementitious material dosage,the maximum size of coral stone,the amount of composite mineral admixture,the water content of concrete cube,and the sand ratio.Through compressive test on cube samples at 3 d,7 d and 28 d,the compressive strength development of SCAC with different mix proportions were investigated.The results showed that under the condition of 70% usage rate of local materials,the effects of cementing material dosage and water content on SCAC strength were similar to that of normal concrete. The combination of increasing cementing material dosage and reducing water content could improve the 28 d compressive strength up to 58 MPa.The appropriate amount of composite mineral admixture could effectively slow down the early strength development of SCAC,and helped for the long-term strength growth.Decreasing the maximum particle size of aggregate led to increased compressive strength of SCAC,but the extent of this effect was gradually decreased with age.The increase in strength owing to increase of sand ratio was found significant in the mixture with low water-binder ratio,but the sand ratio should be controlled within a reasonable range.
- seawater coral aggregate concrete /
- mix proportion design /
- high strength /
- usage rate of local materials

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