文献类型：期刊文献

英文题名：Hydrophobic modification of building gypsum by peat soil: An in-depth analysis of characterization, mechanism, and mechanical properties

作者：Ran, Jingyu Chen, Jiajun Su, Xiangdong

第一作者：冉景榆

通信作者：Ran, JY[1]

机构：[1]Guizhou Inst Technol, Guizhou Phosphogypsum Inst, Guiyang 550003, Peoples R China;[2]Guizhou Inst Technol, Key Lab Light Met Mat Proc Guizhou Prov, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Guizhou Phosphogypsum Inst, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2022

卷号：338

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20221812061303);Scopus(收录号：2-s2.0-85129195268);WOS:【SCI-EXPANDED(收录号:WOS:000796580800004)】；

基金：This work was supported by the Science and Technology Support Plan Project of Guizhou Province (No. [2020] 4Y041) , the Science and Technology project of Guiyang (No. [2020] -8-2) , and the Basic Research Plan of Guizhou Province (No. [2019] 1135) .

语种：英文

外文关键词：Building gypsum; Peat soil; Beta-hemihydrate phosphogypsum; Hydrophobic modification; Water resistance

摘要：Building gypsum is easily affected by moisture, which leads to the decline of the performance of gypsum building materials. Herein, we report a facile method for hydrophobic modification of beta-hemihydrate phosphogypsum (beta-HPG) by peat soil (PS). X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), elemental analysis, and three-phase composition analysis were used to study the hydrophobic characteristics of the as-prepared samples and the relative compressive and flexural strength of the casted specimens were measured to determine mechanical and durability attributes. After heating beta-HPG with 6 wt% of PS at 135 C for 6 h, the as-prepared samples exhibited a noticeable hydrophobic effect, and the water drop penetration time (WDPT) on the powder surface was 2675 s; after casting, the compressive/ flexural strength of the specimens decreased by less than 10% in a more extended curing period.