Natural rubber latex grafted with polyacrylamide as the cement admixture for improving flexural strength and toughness of cement pastes

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2025-02-01 DOI:10.1016/j.indcrop.2024.120310

Songkot Utara , Aphirak Loykaew , Santi Khoonsap , Sompin Mahakot , Sittipong Amnuaypanich

{"title":"Natural rubber latex grafted with polyacrylamide as the cement admixture for improving flexural strength and toughness of cement pastes","authors":"Songkot Utara , Aphirak Loykaew , Santi Khoonsap , Sompin Mahakot , Sittipong Amnuaypanich","doi":"10.1016/j.indcrop.2024.120310","DOIUrl":null,"url":null,"abstract":"<div><div>Natural rubber latex grafted with polyacrylamide (NRL-<em>g</em>-PAM) was employed as the cement admixture for cement pastes. During the preparation of cement pastes, adding NRL-<em>g</em>-PAM improved the homogeneity of freshly prepared cement pastes compared to unmodified NRL. The presence of NRL retarded the hydration of cement, and the retardation was more pronounced with increasing NRL content in the cement pastes. However, the chemical structures of the hydration cement pastes remained unaffected by the presence of natural rubber (NR). Scanning electron microscope (SEM) images of NRL-<em>g</em>-PAM-modified cement pastes revealed the formation of polymeric films in the cement matrix. Beneficially, the polymeric film of NR in the cement pastes enhanced the toughness due to the effective energy absorption of an elastomeric NR. Compared with unmodified cement paste, adding NR-<em>g</em>-PAM improved the flexural strength, which arises from enhanced rubber-cement matrix bonding to compensate for a reduction of cement bonding and cementitious products.</div></div>","PeriodicalId":13581,"journal":{"name":"Industrial Crops and Products","volume":"224 ","pages":"Article 120310"},"PeriodicalIF":5.6000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial Crops and Products","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926669024022878","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

Natural rubber latex grafted with polyacrylamide (NRL-g-PAM) was employed as the cement admixture for cement pastes. During the preparation of cement pastes, adding NRL-g-PAM improved the homogeneity of freshly prepared cement pastes compared to unmodified NRL. The presence of NRL retarded the hydration of cement, and the retardation was more pronounced with increasing NRL content in the cement pastes. However, the chemical structures of the hydration cement pastes remained unaffected by the presence of natural rubber (NR). Scanning electron microscope (SEM) images of NRL-g-PAM-modified cement pastes revealed the formation of polymeric films in the cement matrix. Beneficially, the polymeric film of NR in the cement pastes enhanced the toughness due to the effective energy absorption of an elastomeric NR. Compared with unmodified cement paste, adding NR-g-PAM improved the flexural strength, which arises from enhanced rubber-cement matrix bonding to compensate for a reduction of cement bonding and cementitious products.

查看原文本刊更多论文

用天然胶乳接枝聚丙烯酰胺作为水泥外加剂，提高水泥浆体的抗弯强度和韧性

采用天然胶乳接枝聚丙烯酰胺（NRL-g-PAM）作为水泥膏体的水泥外加剂。在水泥浆制备过程中，与未改性的NRL相比，加入NRL-g- pam改善了新制水泥浆的均匀性。NRL的存在会延缓水泥的水化，且随着NRL含量的增加，这种延缓作用更为明显。然而，水化水泥浆体的化学结构不受天然橡胶（NR）存在的影响。nrl -g- pam改性水泥浆体的扫描电镜（SEM）图像显示了水泥基体中聚合物膜的形成。有益的是，由于弹性体NR的有效能量吸收，水泥浆中的NR聚合物膜增强了韧性。与未改性的水泥浆相比，加入NR-g- pam提高了抗弯强度，这是由于橡胶-水泥基体结合增强，弥补了水泥结合和胶凝产物的减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.