Preparation and properties of a kind of accelerating early strength delayed expansion mine sealing material

doi:10.16265/j.cnki.issn1003-3033.2018.03.025

Abstract

Abstract: In view of that conventional mine cement sealing materials cause shrinkage and conventional expansion agents cause the decreasing strength in the hardening process, a kind of accelerating early strength delayed expansion mine sealing material was prepared. The components of the material are silicate cement, aluminum powder in microcapsules formed by polyacrylamide, water sodium aluminate, sodium chloride, sodium sulfate, triethanolamine, and 2-Acrylamido-2-methyl-1-propanesulfonic acid(AMPS). The influences of admixtures on the properties of the material in early strength and expansion were studied by means of X ray diffraction (XRD) analysis and scanning electron microscopy(SEM). The results show that the compressive strength of the material after hydration for 1 day reaches 4.2 MPa and 3 days reaches 6.7 MPa, the delay time of expansion is 4 h and the inflation rate reaches 19.32% when the mass ratio of sodium chloride to cement is 0.5% ,sodium sulfate 0.5%, triethanolamine 0.05%, AMPS 1%, sodium aluminate 1%, and aluminum type microcapsule 0.1%, which satisfys the need of strength and expansion.

Key words: sealing material, aluminium powder, microencapsulation, expansion rate, compressive strength

CLC Number:

X936

MA Mengxiao, LIU Jian, JI Xiaoli , WU Fen, LUO Qi, ZHANG Chao. Preparation and properties of a kind of accelerating early strength delayed expansion mine sealing material[J]. China Safety Science Journal, 2018, 28(3): 144-148.

References

[1] 宋吴兵,林柏泉,郝志勇,等.瓦斯抽采钻孔新型高水材料封孔性能的研究与应用[J].煤炭工程,2015,47(9): 94-96.
SONG Wubing, LIN Baiquan, HAO Zhiyong, et al. Study and application of new high water material sealing property in gas drainage borehole[J].Coal Engineering,2015,47(9): 94-96.
[2] 郭孟志,张向阳,孙向锋,等.顺层抽放钻孔封孔工艺[J].煤炭科技,2012(3): 103-104.
[3] 孙文标,郭兵兵,张瑞林.氢氧化钠对瓦斯抽采钻孔新型材料性能的影响[J].中国安全科学学报,2016, 26(3): 98-102.
SUN Wenbiao,GUO Bingbing, ZHANG Ruilin. Effect of sodium hydroxide on the properties of new materials for gas extraction drilling [J].China Safety Science Joural, 2016,26(3): 98-102.
[4] 娄振,魏国营,张书进,等.煤层动态裂隙瓦斯抽采技术试验研究[J].中国安全科学学报,2016,26(10): 127-132.
LOU Zhen, WEI Guoying, ZHANG Shujin,et al.Experimental research on gas extraction technology of dynamic fracture of coal seam [J].China Safety science Joural, 2016,26 (10): 127-132.
[5] 房嘉明,赵业城.混凝土膨胀剂机理及应用现状浅谈[J].建筑工程技术与设计,2015(16):1 926.
[6] 陈志勇.铝粉膨胀剂水泥和微膨胀水泥的工程应用[J].科技信息,2007(13): 127-128.
[7] 王栋民,陈华辉,欧阳世翕.高强流态膨胀混凝土力学性能和膨胀行为[J].硅酸盐学报,2004,32(4): 454-459.
WANG Dongmin,CHEN Huahui, OUYANG Shixi. High strength superplasticized expansive concrete mechanical properties and swelling behavior[J].Journal of the Chinese Ceramic Society, 2004,32(4): 454-459.
[8] 刘永强.掺HCSA膨胀剂超高性能混凝土性能的研究[D].长沙:湖南大学,2014.
LIU Yongqiang.Research on performance on UHPC incorporating HCSA expansion agent[D].Changsha:Hunan University,2014.
[9] 孙诗兵,聂光临,姚晓丹,等. 膨胀剂对普通硅酸盐水泥砂浆性能的影响[J].混凝土,2014(9): 94-96.
SUN Shibing, NIE Guanglin, YAO Xiaodan,et al.Research on the influence of expansive agents on properties of ordinary Portland mortar[J].Concrete,2014(9): 94-96.
[10] 苗苗.胶凝材料组成和温度对补偿收缩混凝土变形性能的影响[D].北京:清华大学,2012.
MIAO Miao.Inflence of binding material composition and temperature on the deformation of shrinkage-compensating concrete[D].Beijing:Tsinghua University,2012.
[11] 宣章伟,王小婷,吴海龙.延迟型膨胀剂对水泥基封孔材料性能的影响研究[J].中国安全生产科学技术,2016,11(6): 115-119.
XUAN Zhangwei,WANG Xiaoting,WU Hailong,Study on influence of delayed expansive agent to performance of cement-based hole sealing materials[J].Journal of Safety Science and Technology,2016,11(6):115-119.
[12] 宋少民,贾博雅.膨胀剂对大掺量粉煤灰混凝土强度与碳化的影响[J].建筑技术,2012,43(8): 755-757.
SONG Shaomin,JIA Boya.Influence of expansion agent on strength and carbonization of high volume powdered coal ash concrete[J].Building Technology,2012,43(8): 755-757.
[13] LIU Junlong, MA Haiyang,LI Qiang,et al. Study on optimization of high performance concrete admixtures[J].Transactions of Nanjing University of Aeronautics & Astronautics,2011,28(2): 206-210
[14] GARTNER E M,KURTIS K E,MONTERIRO P J M.Proposed mechanism of C-S-H growth tested by soft X-ray microscopy[J].Cement and Concrete Research,2000,30(5): 817-822.
[15] DOUBBLE D D,HELLAWELL A,PERRY S J.The hydration of portland cement[J].Nature,1976,261(2250): 486-488.
[16] 罗麒,刘健,吉小利,等.两种复合早强剂对煤矿封孔水泥早强效果影响的研究[J].中国安全生产科学技术,2016,12(12): 69-73.
LUO Qi,LIU Jian,JI Xiaoli,et al.Study on influence to early strength performance of hole sealing cement used in coal mine by two kinds of compound early strength agents[J].Journal of Safety Science and Technology,2016,12(12): 69-73.
[17] 林付亿,郑远林.硫酸钠早强剂对预拌混凝土工作性和抗压强度的影响[J].混凝土技术,2007(5): 3-4.
[18] GB/T50080—2011,普通混凝土拌合物性能试验方法标准[S].
GB/T50080-2011,The standard for test method of performance on ordinary fresh concrete[S].
[19] GB/T50081—2002,普通混凝土力学性能试验方法标准[S].
GB/T50081-2002,The standard for test method of mechanical properties on ordinary concrete[S].
[20] 孙璐,张海峰.三乙醇胺-氯化钠早强效果研究[J].河南建材,2010(6): 30-31.
[21] 吴海龙,刘健,娄亚北,等.新型硫酸锂复合早强剂对煤矿封孔水泥早强效果的影响研究 [J].中国安全生产科学技术,2014,10(8): 34-38.
WU Hailong,LIU Jian,LOU Yabei,et al.Study on influence to early strength performance of hole sealing cement used in coal mine by new lithium sulfate compound early strength agent[J].Journal of Safety Science and Technology,2014,10(8): 34-38.