可溶性磷对纸面石膏板板芯强度及纸芯粘结性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (7): 2612-2619.

所属专题：资源综合利用

可溶性磷对纸面石膏板板芯强度及纸芯粘结性能的影响

李翊^1,2, 王宏霞², 武发德², 于剑^1,2, 余海燕¹, 高春勇², 郭君华², 高瑞军²

1.天津城建大学材料科学与工程学院,天津 300192;
2.中国建筑材料科学研究总院有限公司,北京 100024

收稿日期:2023-12-08 修订日期:2024-03-18 出版日期:2024-07-15 发布日期:2024-07-24
通信作者: 王宏霞,博士,教授级高级工程师。E-mail:wxx022@126.com
作者简介:李翊(1997—),男,硕士研究生。主要从事石膏、水泥等建筑材料方面的研究。E-mail:1803401396@qq.com
基金资助:
“十四五”国家重点研发计划(2022YFC3902704)

Effect of Soluble Phosphorus on Core Strength and Paper Core Bonding Property of Paper-Based Gypsum Board

LI Yi^1,2, WANG Hongxia², WU Fade², YU Jian^1,2, YU Haiyan¹, GAO Chunyong², GUO Junhua², GAO Ruijun²

1. School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300192, China;
2. China Building Materials Academy Co., Ltd., Beijing 100024, China

Received:2023-12-08 Revised:2024-03-18 Online:2024-07-15 Published:2024-07-24

摘要/Abstract

摘要： 为了促进磷石膏在纸面石膏板中的高效资源化利用,本文采用X射线衍射、微量热分析、扫描电子显微镜等研究了可溶性磷、萘系减水剂(FDN)及改性淀粉(MS)等三者交互作用对纸面石膏板性能的影响。结果表明,在FDN存在下,可溶性磷会加剧对半水石膏的缓凝作用,小幅降低对石膏试样强度的不利影响。MS明显缩短石膏的水化进程,降低石膏试样的强度。在MS和FDN共存下,随着可溶性磷掺量的增加,石膏达到最高放热峰值的时间延长,水化放热峰值和2 h水化放热总量下降。0.50%(质量分数,下同)的可溶性磷可抵消部分MS对石膏的促凝作用,同时大幅降低石膏试样强度。在FDN存在下,可溶性磷使水化产物的长径比明显降低,晶体形貌呈不规则短柱状或块状,结晶接触点较少。在FDN和可溶性磷共存时,MS使水化产物出现细小块状和粗化板状。在0.4%FDN和0.2%MS掺量下,高于0.50%的可溶性磷会对纸面石膏板的纸芯粘结产生较为不利的影响。本研究中,为保障纸芯粘结性能为Ⅰ级,可溶性磷掺量不宜超过0.25%。

关键词: 可溶性磷, 萘系减水剂, 改性淀粉, 纸面石膏板, 粘结性能

Abstract: In order to improve the efficient resource utilization of phosphogypsum in paper-based gypsum board, the effect of soluble phosphorus, naphthalene water reducer (FDN) and modified starch (MS) on the performance of plasterboard were studied by X-ray diffraction, microcalorimetry and scanning electron microscopy. The results show that in the presence of FDN, soluble phosphorus will aggravate the retarding effect on hemihydrate gypsum and slightly reduce the adverse effect on the strength of gypsum samples. MS significantly shortens the hydration process of gypsum and reduces the strength of gypsum samples. Under the coexistence of MS and FDN, with the increase of soluble phosphorus content, the time for gypsum to reach the highest exothermic peak is prolonged, the peak value of hydration heat release and the total amount of hydration heat release in 2 h are decreased. 0.50% (mass fraction, same below) soluble phosphorus can offset part of the promoting effect of MS on gypsum, and greatly reduce the strength of gypsum samples. In the presence of FDN, soluble phosphorus significantly reduces the aspect ratio of hydration products, the crystal morphology is irregular short column or block, and the crystal contact points are less. When FDN and soluble phosphorus coexist, MS causes the hydration products to appear small blocks and coarse plates. Under the dosage of 0.4% FDN and 0.2% MS, over 0.50% soluble phosphorus will have a more adverse effect on the paper-based gypsum board. In this research, in order to ensure the paper core bonding performance of grade I, the soluble phosphorus content should not exceed 0.25%.

Key words: soluble phosphorus, naphthalene water reducer, modified starch, plasterboard, bonding property

中图分类号:

TQ177

李翊, 王宏霞, 武发德, 于剑, 余海燕, 高春勇, 郭君华, 高瑞军. 可溶性磷对纸面石膏板板芯强度及纸芯粘结性能的影响[J]. 硅酸盐通报, 2024, 43(7): 2612-2619.

LI Yi, WANG Hongxia, WU Fade, YU Jian, YU Haiyan, GAO Chunyong, GUO Junhua, GAO Ruijun. Effect of Soluble Phosphorus on Core Strength and Paper Core Bonding Property of Paper-Based Gypsum Board[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2612-2619.

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可溶性磷对纸面石膏板板芯强度及纸芯粘结性能的影响

Effect of Soluble Phosphorus on Core Strength and Paper Core Bonding Property of Paper-Based Gypsum Board

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