文献类型：期刊文献

英文题名：Hydrophobic Pretreatment of Building Gypsum by Peat Soil: In-Depth Analysis of Characterization, Mechanism and Mechanical Properties

作者：Ran, Jingyu Chen, Jiajun Su, Xiangdong Wang, Wei Zhao, Yuan Zhang, Jie Wei, Chao

第一作者：冉景榆

机构：[1] Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang, 550003, China; [2] Key Laboratory of Light Metal Materials Processing of Guizhou Province, Guizhou Institute of Technology, Guiyang, 550003, China; [3] Guizhou He Yuan New Materials Technology Co., Ltd, Guiyang, 550207, China

第一机构：贵州理工学院

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220060154)

语种：英文

外文关键词：Building materials - Buildings - Compressive strength - Field emission microscopes - Fourier transform infrared spectroscopy - Gypsum - Hydrophobicity - Moisture - Peat - Scanning electron microscopy

摘要：Building gypsum is easily affected by moisture, which leads to the decline of the performance of gypsum building materials. In this study, hydrophobic pretreatment of building gypsum by peat soil (PS) was developed by a one-step process. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), elemental analysis and phase analysis were used to study the hydrophobic characteristics of the gypsum whereas compressive/flexural strength were measured to determine mechanical and durability attributes. After heating beta-hemihydrate phosphogypsum (β-HPG) with 6 wt% of PS at 135°C for 6 h, the samples showed severely hydrophobicity, and the water drop penetration time (WDPT) on the powder surface was 2675 s; after casting, the compressive/flexural strength of the specimens were merely 4% and 7% lower than control group, respectively. The purpose of this work is to solve the problem that building gypsum is prone to moisture and provide guarantee for the performance of gypsum building materials. ? 2022, The Authors. All rights reserved.