Effect of Natural Zeolite Powder on Water Resistance ofMagnesium Oxychloride Cement

Abstract

Abstract: Magnesium oxychloride cement (MOC) has the advantages of light weight,high strength and high wear resistance,however,its poor water resistance restricts its development in the construction industry.To prepare high water resistance of MOC,natural zeolite powder (NZOP) was used as admixture.The effect of NZOP on the setting time,compressive strength and water resistance of MOC was investigated.Meanwhile,X-ray diffractometer,scanning electron microscope and mercury intrusion porosimetry were used to analyze the change of phase composition,microstructure and pore structure of modified MOC.In addition,the concentration of Cl^- in immersing solution was measured by ion chromatograph.The results show that NZOP effectively improves the compressive strength and water resistance of MOC and reduces the initial and final setting time of MOC.After adding 30% (mass fraction) NZOP and 0.5% (mass fraction) phosphoric acid,the 28 d compressive strength and 28 d softening coefficient of MOC reach up to 75.8 MPa and 0.91,respectively,and the concentration of Cl^- in immersing solution is as low as 9.0 mmol/L.In addition,the concentration of Cl^- in immersing solution increases with the decrease of the softening coefficient of MOC.

Key words: magnesium oxychloride cement, natural zeolite powder, phosphoric acid, oxalic acid, water resistance, microstructure

CLC Number:

TQ172

SUN Enyu, CHEN Xiaoyang. Effect of Natural Zeolite Powder on Water Resistance ofMagnesium Oxychloride Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 41-47.

References

[1] WALLING S A,PROVIS J L.Magnesia-based cements:a journey of 150 years,and cements for the future?[J].Chemical Reviews,2016,116(7):4170-4204.
[2] HE P P,POON C S,TSANG D C W.Effect of pulverized fuel ash and CO₂ curing on the water resistance of magnesium oxychloride cement (MOC)[J].Cement and Concrete Research,2017,97:115-122.
[3] 文静,余红发,吴成友,等.氯氧镁水泥水化历程的影响因素及水化动力学[J].硅酸盐学报,2013,41(5):588-596.
WEN J,YU H F,WU C Y,et al.Hydration kinetic and influencing parameters in hydration process of magnesium oxychloride cement[J].Journal of the Chinese Ceramic Society,2013,41(5):588-596 (in Chinese).
[4] 王路明.磷酸/聚合物复合改善氯氧镁水泥耐水性能与机理的研究[J].功能材料,2015,46(13):13066-13069.
WANG L M.Study on the water resistance and mechanism of improving for magnesium oxychloride cement with phosphate and polymer[J].Journal of Functional Materials,2015,46(13):13066-13069 (in Chinese).
[5] 邓德华.磷酸根离子对氯氧镁水泥水化物稳定性的影响[J].建筑材料学报,2002,5(1):9-12.
DENG D H.Effect of the phosphate anion on the stabilization of hydrate in magnesium oxychloride cement[J].Journal of Building Materials,2002,5(1):9-12 (in Chinese).
[6] 张婷婷,孙延杰.硅灰和六偏磷酸钠对氯氧镁水泥耐水性影响的数学建模和微观分析[J].建材技术与应用,2018(2):1-5+11.
ZHANG T T,SUN Y J.Mathematical modeling and microscopic analysis of effect of silica fume and sodium hexametaphosphate on water resistance of magnesium oxychloride cement[J].Research & Application of Building Materials,2018(2):1-5+11 (in Chinese).
[7] 冯超,关博文,张奔,等.减水剂作用下氯氧镁水泥中水分侵蚀行为[J].非金属矿,2019,42(2):41-44.
FENG C,GUAN B W,ZHANG B,et al.Moisture erosion behavior of magnesium oxychloride cement with the action of water reducer[J].Non-Metallic Mines,2019,42(2):41-44 (in Chinese).
[8] CHAU C K,CHAN J,LI Z J.Influences of fly ash on magnesium oxychloride mortar[J].Cement and Concrete Composites,2009,31(4):250-254.
[9] 余红发,李生堂,何庆英,等.MgO-SF-FA-MgCl₂-H₂O胶凝材料体系的长期强度及耐水性研究[J].硅酸盐学报,2000,28(s1):33-37.
YU H F,LI S T,HE Q Y,et al.Research on long-term strength and water-resistance of MgO-sf-fa-MgCl₂-H₂O system cementitious materials[J].Journal of the Chinese Ceramic Society,2000,28(s1):33-37 (in Chinese).
[10] DENG D H.The mechanism for soluble phosphates to improve the water resistance of magnesium oxychloride cement[J].Cement and Concrete Research,2003,33(9):1311-1317.
[11] CHEN X Y,ZHANG T T,BI W L,et al.Effect of tartaric acid and phosphoric acid on the water resistance of magnesium oxychloride (MOC) cement[J].Construction and Building Materials,2019,213:528-536.
[12] 陈啸洋,毕万利,张婷婷,等.柠檬酸对氯氧镁水泥的改性[J].硅酸盐学报,2019,47(7):884-890.
CHEN X Y,BI W L,ZHANG T T,et al.Modification of magnesium oxychloride cement by citric acid[J].Journal of the Chinese Ceramic Society,2019,47(7):884-890 (in Chinese).

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