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CHEN Xiao, WANG Xiu-li, HOU Hong-jie, MA Yun-long, PAN Xu-bin, HU En-jin. Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 229-233. doi: 10.13204/j.gyjzG22041823
Citation: CHEN Xiao, WANG Xiu-li, HOU Hong-jie, MA Yun-long, PAN Xu-bin, HU En-jin. Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 229-233. doi: 10.13204/j.gyjzG22041823

Effects of Mixed Metakaolin and Silica Fume on Mechanical Properties of EPS Concrete

doi: 10.13204/j.gyjzG22041823
  • Received Date: 2022-04-18
    Available Online: 2023-02-06
  • In order to study the effect of different dosages of metakaolin and silica fume on the physical and mechanical properties of EPS concrete, metakaolin and silica fume with different contents were used as auxiliary cementing materials, and the contents of 0%, 5%, 10% and 15% were used to replace part of the cement, respectively, and 16 groups of EPS concrete specimens with different proportions were prepared. The water absorption, compressive strength, flexural strength and splitting tensile strength were measured. The results showed that the addition of a certain amount of silica fume and metakaolin could reduce the water absorption of EPS concrete and improve its compressive strength, bending and splitting tensile strength, but when the dosage was too high, the water absorption would increase and the strength would decrease, and when the content of both was 10%, EPS concrete had the lowest water absorption and the best mechanical properties. Although the particle size of metakaolin was larger than that of silica fume, its "pozzolanic effect" was stronger, so the improvement of the mechanical properties of EPS concrete was better than that of silica fume. Metakaolin and silica fume could improve the adhesion of EPS particles to the gel matrix.
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