脱硫石膏基与磷石膏基自流平砂浆的性能差异研究

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发布时间：2020-01-06 00:00:00

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脱硫石膏基与磷石膏基自流平砂浆的性能差异研究

Study on performance difference between desulfurization gypsum-based and phosphogypsum-based self-leveling mortars

2024年第8期

脱硫石膏；磷石膏；自流平砂浆；磷酸盐；二水石膏；性能研究

Desulphurization gypsum; Phosphogypsum; Self-leveling mortar; Phosphate; Dihydrate gypsum; Performance study

2024年第8期

10.19761/j.1000-4637.2024.08.091.06

戴浩1，宋旭艳2，孔俊俊1，宋丹丹1，穆鑫泉2，张雪飞2

1.江苏兆佳建材科技有限公司苏州分公司，江苏苏州 215151；2.苏州科技大学江苏苏州 215009

戴浩1，宋旭艳2，孔俊俊1，宋丹丹1，穆鑫泉2，张雪飞2

戴浩,宋旭艳,孔俊俊,等.脱硫石膏基与磷石膏基自流平砂浆的性能差异研究[J].混凝土与水泥制品,2024(8):91-96.

DAI H,SONG X Y,KONG J J,et al.Study on performance difference between desulfurization gypsum-based and phosphogypsum-based self-leveling mortars[J].China Concrete and Cement Products,2024(8):91-96.

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1000

摘要：分别对比研究了水泥掺量（0、2.5%、5.0%、7.5%、10.0%）和氢氧化钙掺量（0、0.25%、0.50%、1.00%、2.00%）对脱硫石膏基自流平砂浆（S砂浆）和磷石膏基自流平砂浆（P砂浆）工作性和力学性能的影响，分析了磷酸盐和二水石膏含量对S砂浆性能的影响机理。结果表明：随着水泥掺量的增加，S、P砂浆的流动度均先增加后趋于平稳，初凝时间基本先延长后缩短，S砂浆的24 h抗压强度先升高后降低，P砂浆的24 h抗压强度先降低后升高；随着氢氧化钙掺量的增加，S、P砂浆的初凝时间均先延长后缩短再趋于平稳，S砂浆的流动度先增加后趋于平稳，P砂浆的流动度先增加后降低，24 h抗压强度变化规律与掺水泥时相同；磷酸盐的掺入降低了S砂浆的流动度降低，但在一定的水泥或氢氧化钙掺量范围内，磷酸盐能提高S砂浆的强度；二水石膏的掺入降低了S砂浆的流动度保持能力和强度。 Abstract: The effects of cement content (0, 2.5%, 5.0%, 7.5%, 10.0%) and calcium hydroxide content (0, 0.25%, 0.50%, 1.00%, 2.00%) on the workability and mechanical properties of desulfurization gypsum-based self-leveling mortar(S-mortar) and phosphogypsum-based self-leveling mortar(P-mortar) were compared and studied. The influence mechanism of phosphate and dihydrate gypsum content on the performance of S-mortar was analyzed. The results show that with the increase of cement content, the fluidity of S-mortar and P-mortar first increases and then tends to stabilize, and the initial setting time is basically extended and then shortened. The 24 h compressive strength of S-mortar first increases and then decreases, while the 24 h compressive strength of P-mortar first decreases and then increases. With the increase of calcium hydroxide content, the initial setting time of S-mortar and P-mortar first extends and then shortens and then tends to stabilize, the fluidity of S-mortar first increases and then tends to stabilize, while the fluidity of P-mortar first increases and then decreases. The 24 h compressive strength change pattern is the same as when adding cement. The addition of phosphate reduces the fluidity of S-mortar, but within a certain range of cement or calcium hydroxide content, phosphate can improve the strength of S-mortar. The addition of dihydrate gypsum reduces the ability to maintain the fluidity and strength of S-mortar.

英文名 : Study on performance difference between desulfurization gypsum-based and phosphogypsum-based self-leveling mortars

刊期 : 2024年第8期

关键词 : 脱硫石膏；磷石膏；自流平砂浆；磷酸盐；二水石膏；性能研究

Key words : Desulphurization gypsum; Phosphogypsum; Self-leveling mortar; Phosphate; Dihydrate gypsum; Performance study

刊期 : 2024年第8期

DOI : 10.19761/j.1000-4637.2024.08.091.06

文章编号 :

基金项目 :

作者 : 戴浩1，宋旭艳2，孔俊俊1，宋丹丹1，穆鑫泉2，张雪飞2

单位 : 1.江苏兆佳建材科技有限公司苏州分公司，江苏苏州 215151；2.苏州科技大学江苏苏州 215009

戴浩1，宋旭艳2，孔俊俊1，宋丹丹1，穆鑫泉2，张雪飞2

戴浩,宋旭艳,孔俊俊,等.脱硫石膏基与磷石膏基自流平砂浆的性能差异研究[J].混凝土与水泥制品,2024(8):91-96.

DAI H,SONG X Y,KONG J J,et al.Study on performance difference between desulfurization gypsum-based and phosphogypsum-based self-leveling mortars[J].China Concrete and Cement Products,2024(8):91-96.

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摘要

参数

结论

参考文献

引用本文

Abstract: The effects of cement content (0, 2.5%, 5.0%, 7.5%, 10.0%) and calcium hydroxide content (0, 0.25%, 0.50%, 1.00%, 2.00%) on the workability and mechanical properties of desulfurization gypsum-based self-leveling mortar(S-mortar) and phosphogypsum-based self-leveling mortar(P-mortar) were compared and studied. The influence mechanism of phosphate and dihydrate gypsum content on the performance of S-mortar was analyzed. The results show that with the increase of cement content, the fluidity of S-mortar and P-mortar first increases and then tends to stabilize, and the initial setting time is basically extended and then shortened. The 24 h compressive strength of S-mortar first increases and then decreases, while the 24 h compressive strength of P-mortar first decreases and then increases. With the increase of calcium hydroxide content, the initial setting time of S-mortar and P-mortar first extends and then shortens and then tends to stabilize, the fluidity of S-mortar first increases and then tends to stabilize, while the fluidity of P-mortar first increases and then decreases. The 24 h compressive strength change pattern is the same as when adding cement. The addition of phosphate reduces the fluidity of S-mortar, but within a certain range of cement or calcium hydroxide content, phosphate can improve the strength of S-mortar. The addition of dihydrate gypsum reduces the ability to maintain the fluidity and strength of S-mortar.

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脱硫石膏基与磷石膏基自流平砂浆的性能差异研究

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