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Volume 43 Issue S2
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ZHANG He-nian, CHEN Liang, LI Xiong-wei, XI Pei-sheng, MU Lin, HU Cai-yun. Ratio and mechanism of activated magnesium oxide carbonized raw earth block materials[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 233-236. DOI: 10.11779/CJGE2021S2055
Citation: ZHANG He-nian, CHEN Liang, LI Xiong-wei, XI Pei-sheng, MU Lin, HU Cai-yun. Ratio and mechanism of activated magnesium oxide carbonized raw earth block materials[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 233-236. DOI: 10.11779/CJGE2021S2055
shu

Ratio and mechanism of activated magnesium oxide carbonized raw earth block materials

  • 1.

    School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China

  • 2.

    Nanjing Southern New Town Development & Construction (Group) Co. LTD, Nanjing 210000, China

  • 3.

    Anhui Tendering Group, Hefei 230051, China

  • 4.

    Changzhou Engineering Vocational and Technical College, Changzhou 213164, China

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  • Received Date: August 16, 2021
  • Available Online: December 05, 2022
    Graphical Abstract
    • Abstract
  • By means of the single-factor compressive strength tests, X-ray diffraction (XRD) tests and scanning electron microscope (SEM) tests, the variation rules of strength and microscopic morphology of the activated magnesium oxide (MgO) carbonized raw earth blocks under the influences of different material contents and water contents are studied. The results show that when the mixture ratio of raw materials of the active MgO-carbonized raw soil blocks is 7:7:6:80 MgO: cement: fly ash: raw soil and water is added according to the optimal moisture content of raw soil substrate, the compressive strength of the blocks prepared is higher, and the 21-day compressive strength tends to be stable, with an average value of about 7~8 MPa. The XRD and SEM tests show that the strength, cementing property and pore filling of magnesium-type carbonate generated by hydration and carbonation reaction of the active MgO cement are the main reasons for the increase of strength of the blocks.
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    • References (10)
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