掺合料对磷石膏基复合胶凝材料耐水性及强度的影响综述

doi:10.11962/1006-4990.2020-0029

Abstract

Abstract:

Phosphogypsum contains soluble phosphorus,fluorine and other impurites,which leads to its relatively low utiliza-tion rate in construction industry.Moreover,water resistance of phosphogypsum materials is extremely poor.It is necessary to mixture other hydraulic admixtures to improve their water resistance.And different physical and chemical properties of phosphogypsum in different areas can result in some differences in mechanical properties of phosphogypsum-based composite cementitious materials.Aiming at above problems,the major types of phosphogypsum-based composite cementitious materials were introduced.Effects of fly ash,slag,quicklime and cement on water resistance and strength of different phosphogypsum-based composite cementitious materials were analyzed in detail,and the influence rules were further declared.Finally,the recommended content range of fly ash,slag,quicklime and cement in phosphogypsum-based composite cementitious materials were confirmed.

Key words: phosphogypsum, composite cementitious materials, admixtures, fly ash, slag

CLC Number:

TQ126.31

Luo Shuang,Fu Rubin,Kong Dewen,Xie Lang,Zhou Yinsheng,Zhao Yan. Summary on effects of admixtures on water resistance and strength of phosphogypsum-based composite cementitious materials[J]. Inorganic Chemicals Industry, 2020, 52(11): 6-6.

Figures/Tables 10

References 25

[1]	Shen W, Gan G, Dong R, et al. Utilization of solidified phosphogyp-sum as Portland cement retarder.[J]. Journal of Material Cycles and Waste Management, 2012,14(3):228-233. doi: 10.1007/s10163-012-0065-x
[2]	刘路珍, 陈德玉, 何玉龙, 等. 磷石膏粒径及pH值对其复合胶凝材料的影响[J]. 非金属矿, 2015,38(3):5-8.
[3]	Dutta R K, Khatri V N, Panwar V. Strength characteristics of fly ash stabilized with lime and modified with phosphogypsum[J]. Journal of Building Engineering, 2017,14:32-40. doi: 10.1016/j.jobe.2017.09.010
[4]	张逸超, 王莹. 现浇磷石膏墙体材料制备研究[J]. 智能城市, 2018,21(4):22-23.
[5]	杨林, 严云, 胡志华. 大掺量磷石膏高强砖制备及性能研究[J]. 非金属矿, 2011,34(5):32-34,47.
[6]	Li Y B, Dai S, Zhang Y, et al. Preparation and thermal insulation performance of cast-in-situ phosphogypsum wall[J]. Journal of App-lied Biomaterials and Fundamental Materials, 2018,16(S1):81-92.
[7]	伍勇华, 姚源, 南峰, 等. 脱硫石膏-粉煤灰-水泥胶凝体系强度及耐久性能研究[J]. 硅酸盐通报, 2014,33(2):315-320.
[8]	何玉鑫, 华苏东, 瞿县. 石膏矿渣绿色材料的研究进展[J]. 无机盐工业, 2014,46(5):13-15.
[9]	Wang T, Gao X J, Wang J. Preparation of foamed phosphogypsum lightweight materials by incorporating cementitious additives[J]. Materials Science, 2019,25.Doi 10.5755/j01.ms.25.3.19910.
[10]	彭家惠, 彭志辉, 张建新. 磷石膏基无水石膏胶结材研究[J].混凝土与水泥制品, 2002(1):42-45.
[11]	王玉麟, 赖振斌, 黄巧玲, 等. 磷石膏基保温砂浆胶粉料试验研究[J]. 新型建筑材料, 2012,39(12):22-23,29.
[12]	刘民荣. 石膏及其复合材料的防水性能研究[D]. 济南:济南大学, 2011.
[13]	何玉龙, 陈德玉, 王舒州, 等. 磷石膏基胶凝材料的试验研究[J]. 非金属矿, 2015,38(4):19-22.
[14]	刘心中, 董凤芝, 赵云霞, 等. 磷石膏、粉煤灰胶结材的研究[J].化工矿物与加工, 2001(7):12-14.
[15]	李向涛, 谢红波. 耐水高强磷石膏实心砖的研制[J].混凝土与水泥制品, 2013(3):58-61.
[16]	Chen Q S, Zhang Q L, Fourie A, et al Utilization of phosphogypsum and phosphate tailings for cemented paste backfill[J]. Journal of Environmental Management, 2017,201:19-27. doi: 10.1016/j.jenvman.2017.06.027 pmid: 28633078
[17]	周灿灿, 郭小雨, 邓先功, 等. 原状磷石膏基水硬性胶凝材料的制备与性能表征[J]. 安徽工业大学学报:自然科学版, 2019,36(1):29-34.
[18]	毋博, 赵志曼, 田睿, 等. 改性磷建筑石膏防水性能研究[J]. 非金属矿, 2018,41(5):34-37.
[19]	尹明干, 汪晖, 石飞停. 改性磷石膏的强度与孔结构的研究[J]. 材料导报, 2018,32(A2):526-529.
[20]	何玉鑫, 万建东, 华苏东, 等. 免煅烧磷石膏砖的制备与性能研究[J]. 新型建筑材料, 2013,40(1):45-47,68.
[21]	Huang Y, Lin Z S. Investigation on phosphogypsum-steel slag-gran-ulated blast-furnace slag-limestone cement[J]. Construction & Building Materials, 2010,24(7):1296-1301.
[22]	彭志辉, 彭家惠, 张建新, 等. 二水磷石膏粉煤灰复合胶结材研究[J].粉煤灰综合利用, 2001(1):3-6.
[23]	田甜, 严云, 胡志华, 等. 高韧性磷石膏板材的研究[J]. 武汉理工大学报, 2014,36(7):22-29.
[24]	张毅, 王小鹏, 李东旭. 利用原状磷石膏制备石膏基复合胶凝材料的力学性能[J]. 南京工业大学学报:自然科学版, 2011,33(1):68-73.
[25]	朱丽苹.硅酸盐水泥改性磷建筑石膏砂浆性能研究[J/OL]. 2019-08-21)[2019-12-27]. 化工矿物与加工.http:∥kns.cnki.net/kcms/detail/32.1492.tq.20190821.1126.004.html.

掺合料	优势	劣势
粉煤灰	1）生成C-S-H、AFt包裹磷石膏颗粒,提高软化系数;2）未水化的粉煤灰作为微集料填充在硬化体的孔隙中,降低孔隙率,使结构更加致密。	1）过量未水化的的粉煤灰颗粒引起硬化体的密实度下降,耐水性能降低;2）过量的粉煤灰导致体系碱性降低,生成的C-S-H、AFt不能完全包裹石膏颗粒,致使试样软化系数降低。
矿渣	1）具有较好的水化活性;2）水化产生C-S-H、AFt包裹磷石膏颗粒,提高软化系数。	1）需在碱性溶液（pH>12）激发下效果较好;2）过量易延迟钙矾石的形成,导致石膏开裂;3）需要掺入大量矿渣才能有效提高耐水性,相对减少了磷石膏利用量。
水泥	1）与石膏混合形成钙矾石、水化硅酸钙凝胶,提高了石膏耐水性;2）不需碱性环境,自身即可水化。	过量的水泥将形成过多的水硬性成分,对材料的内部结构产生破坏作用。
生石灰	入水生成溶解度低的CaCO₃包裹在石膏周围,降低石膏的溶解度,增强耐水性。	过量的生石灰导致Ca（OH）₂生成量大于难容的CaCO₃,结构致密性破坏,耐水性下降。

掺合料	优势	劣势
粉煤灰矿渣	形成明显火山灰效应,有效提高强度。	1）对早期强度提高不明显;2）自身水硬胶凝性能差。
矿渣	1）形成火山灰效应,有效提高强度;2）潜在活性大于粉煤灰。	需在强碱溶液（pH>12）环境下发生反应,才能发挥出较高的胶凝性能,促使硬化浆体更致密。
水泥	1）自身可进行水化作用;2）有效提高早期强度;3）形成碱性溶液环境,促进掺合料的火山灰效应;4）生成难溶于水的钙钒石填充在晶体框架的内部,增强强度;5）活性高于粉煤灰。	过量的水泥将生成过量的钙矾石晶体,而钙矾石晶体具有一定膨胀性,对强度产生不良影响。
生石灰	1）形成碱性溶液环境;2）可中和磷石膏中的可溶磷、氟杂质生成稳定物质,促使强度提高。	1）自身不具备胶凝能力;2）过量生石灰产生大量游离CaO,易引起体积不稳定问题,导致强度降低;3）过量生石灰形成过饱和Ca（OH）₂溶液环境、过高钙硅比,使得其聚合度降低,强度降低。

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Summary on effects of admixtures on water resistance and strength of phosphogypsum-based composite cementitious materials

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