粉煤灰掺量对氯氧镁水泥混凝土物理力学性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1564-1572.

所属专题：资源综合利用

粉煤灰掺量对氯氧镁水泥混凝土物理力学性能的影响

刘盼^1,2,3, 常成功^1,2, 刘秀泉^1,2,3, 董金美^1,2, 郑卫新^1,2, 肖学英^1,2, 文静^1,2

1.中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,西宁 810008;
2.青海省盐湖资源化学重点实验室,西宁 810008;
3.中国科学院大学,北京 100049

收稿日期:2020-12-03 修回日期:2021-02-05 出版日期:2021-05-15 发布日期:2021-06-07
通讯作者: 肖学英,研究员。E-mail:xiaoxy@isl.ac.cn.ac
文静,副研究员。E-mail:wj580420@isl.ac.cn.ac
作者简介:刘盼(1993—),男,硕士研究生。主要从事盐湖镁资源综合利用以及镁质胶凝材料的耐久性研究。E-mail:liupan18@mails.ucas.ac.cn
基金资助:
青海省重点研发与转化计划(2019-GX-165);青海省应用基础研究项目(2020-ZJ-746);中国科学院青年创新促进会(2018467,2019423)

Influence of Fly ash Content on Physical and Mechanical Properties of Magnesium Oxychloride Cement Concrete

LIU Pan^1,2,3, CHANG Chenggong^1,2, LIU Xiuquan^1,2,3, DONG Jinmei^1,2, ZHENG Weixin^1,2, XIAO Xueying^1,2, WEN Jing^1,2

1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;
2. Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes, Xining 810008, China;
3. University of Chinese Academy of Science, Beijing 100049, China

Received:2020-12-03 Revised:2021-02-05 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 为了拓展氯氧镁水泥(MOC)材料的应用领域,以盐湖提钾肥副产物水氯镁石、轻烧氧化镁和粉煤灰为胶凝材料,制备了不同粉煤灰掺量的氯氧镁水泥混凝土(MOCC)。研究了粉煤灰掺量对MOCC抗压强度、物相组成、微观形貌和孔结构的影响。结果表明:随着粉煤灰掺量的增加,MOCC的抗压强度逐渐降低,当粉煤灰掺量为40%(质量分数)时,其300 d抗压强度降低至39.99 MPa,降低了22.52%。MOCC的主要水化产物为5Mg(OH)₂·MgCl₂·8H₂O(5·1·8)和Mg(OH)₂,掺加粉煤灰并没有产生新的晶相。掺入粉煤灰增加了MOCC的孔隙率和有害孔体积,从而降低了其抗压强度。采用相同水灰比制备了普通硅酸盐水泥混凝土,抗压强度对比测试结果表明:掺40%的粉煤灰MOCC的抗压强度虽然比未掺粉煤灰MOCC抗压强度低,但仍比普通硅酸盐水泥混凝土300 d龄期的抗压强度(33.42 MPa)高出19.66%,说明MOCC比普通硅酸盐水泥混凝土具有较高的抗压强度。

关键词: 水氯镁石, 氯氧镁水泥混凝土, 微观结构, 粉煤灰, 抗压强度, 凝结时间

Abstract: In order to expand the application fields of magnesium oxychloride cement (MOC) materials, magnesium oxychloride cement concrete (MOCC) with different fly ash content was prepared by using bischofite, light burned magnesia and fly ash as cementitious materials, in which bischofite is a by-product of potassium fertilizer extracted from salt lake. The influence of fly ash content on compressive strength, phase composition, micromorphology and pore structure of MOCC were studied. The results show that with the increase of fly ash content, the compressive strength of MOCC gradually decreases. When the content of fly ash is 40% (mass fraction), its 300 d compressive strength decreases to 39.99 MPa, which is a decrease of 22.52%. The main hydration products of MOCC are 5Mg(OH)₂·MgCl₂·8H₂O(5·1·8) and Mg(OH)₂. The addition of fly ash does not produce a new crystal phase. The addition of fly ash increases the porosity and harmful pore volume of MOCC, thereby reducing its compressive strength. Ordinary Portland cement concrete was prepared with the same water-cement ratio. The comparative test results of compressive strength show that although the compressive strength of MOCC with 40% fly ash is lower than that of MOCC without fly ash, it is still 19.66% higher than that of ordinary Portland cement concrete at 300 d age, indicating that MOCC has higher compressive strength than that of ordinary Portland cement concrete.

Key words: bischofite, magnesium oxychloride cement concrete, microstructure, fly ash, compressive strength, setting time

中图分类号:

TU528

刘盼, 常成功, 刘秀泉, 董金美, 郑卫新, 肖学英, 文静. 粉煤灰掺量对氯氧镁水泥混凝土物理力学性能的影响[J]. 硅酸盐通报, 2021, 40(5): 1564-1572.

LIU Pan, CHANG Chenggong, LIU Xiuquan, DONG Jinmei, ZHENG Weixin, XIAO Xueying, WEN Jing. Influence of Fly ash Content on Physical and Mechanical Properties of Magnesium Oxychloride Cement Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1564-1572.

参考文献

[1] 李龙.青海盐湖镁资源利用概述[J].广东化工,2011,38(9):85-86.
LI L. Magnesium resources and utilization of Qinghai salt lake[J]. Guangdong Chemical Industry, 2011, 38(9): 85-86 (in Chinese).
[2] 徐徽.从世界纯碱发展历史谈青海盐湖镁资源开发技术路线与镁产业发展前景[C]//2018年镁化合物行业年会暨行业发展论坛论文集,2018:10.
XU H. The technical route of exploitation of magnesium resources and the development prospect of magnesium industry in Qinghai salt lake are discussed from the development history of soda ash in the world[C]//2018 Magnesium Compound Industry Annual Meeting & Industry Development Forum Proceedings, 2018: 10 (in Chinese).
[3] 马国华.氯化钾生产中废物排放对盐湖环境影响的探讨[J].盐业与化工,2010,39(2):50-51.
MA G H. Discussion on potassium chloride production waste discharges impout on the enviromental of salt lake[J]. Journal of Salt and Chemical Industry, 2010, 39(2): 50-51 (in Chinese).
[4] 陈爱兵.开发盐湖氯化镁产品提高资源综合利用能力[J].盐业与化工,2013,42(12):35-37.
CHEN A B. Development and production of saline lake magnesium chloride product, improvement of resource utilization capacity[J]. Journal of Salt and Chemical Industry, 2013, 42(12): 35-37 (in Chinese).
[5] SOREL S. On a new magnesium cement[J]. Comptes Rendus-Academic Dessciences, 1867, 65(1): 2-4
[6] XIE Y D, LIN X J, LI H F, et al. Effect of polyvinyl alcohol powder on the bonding mechanism of a new magnesium phosphate cement mortar[J]. Construction and Building Materials, 2020, 239: 117871.
[7] 马慧,关博文,王永维,等.氯氧镁水泥胶凝材料的研究进展[J].材料导报,2015,29(15):103-107.
MA H, GUAN B W, WANG Y W, et al. Research progress of magnesium oxychloride cement gelled material[J]. Materials Review, 2015, 29(15): 103-107 (in Chinese).
[8] LI J, HUANG Z X. Experimental and thermal analysis of sheet molding compound with magnesium oxychloride crystal salt using as flame retardant[J]. Advanced Materials Research, 2009, 79/80/81/82: 1427-1430.
[9] XU B W, MA H Y, HU C L, et al. Influence of cenospheres on properties of magnesium oxychloride cement-based composites[J]. Materials and Structures, 2016, 49(4): 1319-1326.
[10] LI Z J, ZHANG Y S. Development of sustainable cementitious materials[C]//In: proceedings of the international workshop on sustainable development and concrete technology, 2004: 55-76.
[11] 张洪彪.气凝胶在建筑节能领域的应用[J].商品与质量,2016(22):224-225.
ZHANG H B. Application of aerogel in the field of building energy saving [J]. Shangpin Yu Zhiliang, 2016(22): 224-225 (in Chinese).
[12] 李创,余红发,李颖,等.镁水泥材料的吸潮返卤性能研究[J].硅酸盐通报,2011,30(2):373-378.
LI C, YU H F, LI Y, et al. Study on moisture absorption and efflorescence properties of magnesium oxychloride cement materials[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(2): 373-378 (in Chinese).
[13] 曹永敏,王自福,张兴福,等.菱镁胶凝材料改性剂的试验研究[J].玻璃钢/复合材料,2001(6):21-24+10.
CAO Y M, WANG Z F, ZHANG X F, et al. Research of magnesitic gelation modifiers[J]. Fiber Reinforced Plastics/Composite, 2001(6): 21-24+10 (in Chinese).
[14] POWER I M, DIPPLE G M, FRANCIS P S. Assessing the carbon sequestration potential of magnesium oxychloride cement building materials[J]. Cement and Concrete Composites, 2017, 78: 97-107.
[15] 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.
[16] 董金美,余红发,张立明.水合法测定活性MgO含量的试验条件研究[J].盐湖研究,2010,18(1):38-41.
DONG J M, YU H F, ZHANG L M. Study on experimental conditions of hydration methods of determining active magnesium oxide content[J]. Journal of Salt Lake Research, 2010, 18(1): 38-41 (in Chinese).
[17] 赵华,王永维,关博文,等.粉煤灰对氯氧镁水泥早期性能的影响[J].材料导报,2015,29(18):117-121+135.
ZHAO H, WANG Y W, GUAN B W, et al. Effect of fly ash on early properties of magnesium oxychloride cement[J]. Materials Review, 2015, 29(18): 117-121+135 (in Chinese).
[18] 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).
[19] GUO Y Y, ZHANG Y X, SOE K, et al. Effect of fly ash on mechanical properties of magnesium oxychloride cement under water attack[J]. Structural Concrete, 2020, 21(3): 1181-1199.
[20] 吴中伟,廉慧珍.高性能混凝土[M].北京:中国铁道出版社,1999.
WU Z W, LIAN H Z. High performance concrete[M]. Beijing: China Railway Press, 1999 (in Chinese).

粉煤灰掺量对氯氧镁水泥混凝土物理力学性能的影响

Influence of Fly ash Content on Physical and Mechanical Properties of Magnesium Oxychloride Cement Concrete

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