Influence of Washing Concrete Transfer Car Mud Powder on Concrete Performance
DONG Longrui1, HANG Meiyan1, ZHOU Gangming1, JIA Chun2, XU Junwei1
1 School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China 2 Baotou Tianlong Concrete Limited Liability Company, Baotou 014010, China
Abstract: Use the mixing plant to rinse the waste mud powder deposited by the concrete transfer car and replace the fine aggregate in the concrete after drying,the working performance, mechanical performance, micro-pore structure distribution and the influence on the early and long-term shrinkage of concrete under different dosage of concrete are studied.The test results show that with the increase of mud powder content, concrete strength decreases gradually in the early stage, strength increases first and then decreases in the later stage, slump decreases, slump loss increases after 1 h, early and long-term shrinkage is proportional to mud powder content, and shrinkage of concrete in the first 21 days increases. After adding 10% mud powder, the pore structure of concrete is optimized, the large and medium holes in concrete are transferred to small holes, the proportion of harmful and multi-harmful holes is reduced, and the pore structure of concrete is optimized, the porosity of concrete is the smallest and the strength of concrete is improved in the later period.
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2020, Vol. 34 
