Study of Mechanical Properties and Durability of Alkali-Activated Coal Gangue-Slag Concrete

硅酸盐水泥 煤矸石 材料科学 抗压强度 水泥 复合材料 冶金 弹性模量 废物管理 工程类
作者
Hongguang Zhu,Sen Yang,Weijian Li,Zonghui Li,Jingchong Fan,Zhengyan Shen
出处
期刊:Materials [Multidisciplinary Digital Publishing Institute]
卷期号:13 (23): 5576-5576 被引量:37
标识
DOI:10.3390/ma13235576
摘要

Herein, a new geopolymer is recognized as a potential alternative cementing material of ordinary Portland cement (OPC), which is used for reducing carbon emissions and efficiently recycling the waste. Therefore this paper mainly studied the alkali-activated coal gangue-slag concrete (ACSC) was prepared by using the coal gangue-slag and Na2SiO3 and NaOH complex activator. The ratio of coal gangue (calcined and uncalcined) coarse aggregate replacing the gravel was 0%, 30%, 50%, 70%, and 100%. The water and salt freeze-thaw resistance, compressive strength, chloride permeation, microstructure, performance mechanism, inner freeze-thaw damage distribution, and mechanics models of ACSC were investigated. Results show that ACSC displayed excellent early age compressive strength, and the compact degree and uniformity of structure were better compared with the ordinary Portland cement (OPC) when the coal gangue replacement rate was less than 50%. The ACSC demonstrated the best chloride penetration resistance under 30% uncalcined coal gangue content, which was less than 27.75% lower than that of using OPC. At the same number cycles, especially in the salt freezing, the calcined coal gangue had lowered advantages of improving resistance freeze-thaw damage resistance. Water and salt accumulative freeze-thaw damage mechanics models of ACSC were established by using the relative dynamic elasticity modulus. The exponential function model was superior to the power function model with better precision and relativity, and the models accurately reflected the freeze-thaw damage effect.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
康谨发布了新的文献求助10
1秒前
不倦应助joleisalau采纳,获得10
2秒前
和谐初南完成签到,获得积分10
2秒前
5秒前
共享精神应助吴倩采纳,获得10
5秒前
大模型应助感动的仙人掌采纳,获得10
5秒前
wdb完成签到,获得积分10
6秒前
7秒前
闪闪溪灵发布了新的文献求助10
8秒前
Ray完成签到,获得积分20
8秒前
ldh032应助张张采纳,获得10
10秒前
正直绍辉关注了科研通微信公众号
11秒前
11秒前
11秒前
我是老大应助xmy采纳,获得10
11秒前
青青草发布了新的文献求助10
12秒前
Orange应助陌尘采纳,获得10
12秒前
13秒前
岁岁菌完成签到,获得积分10
13秒前
海马体完成签到,获得积分10
14秒前
李健的小迷弟应助w934420513采纳,获得10
15秒前
竹纤维完成签到 ,获得积分10
15秒前
xiaozhang发布了新的文献求助10
16秒前
nz完成签到,获得积分10
17秒前
18秒前
闪闪溪灵完成签到,获得积分20
20秒前
22秒前
22秒前
23秒前
zlsf应助李昆朋采纳,获得30
23秒前
23秒前
青青草完成签到,获得积分10
24秒前
正直绍辉发布了新的文献求助10
26秒前
wdb发布了新的文献求助10
27秒前
科研通AI5应助研友_8YK7Pn采纳,获得10
27秒前
28秒前
29秒前
29秒前
31秒前
31秒前
高分求助中
【此为提示信息,请勿应助】请按要求发布求助,避免被关 20000
Continuum Thermodynamics and Material Modelling 2000
Encyclopedia of Geology (2nd Edition) 2000
105th Edition CRC Handbook of Chemistry and Physics 1600
Maneuvering of a Damaged Navy Combatant 650
Mixing the elements of mass customisation 300
the MD Anderson Surgical Oncology Manual, Seventh Edition 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3778170
求助须知:如何正确求助?哪些是违规求助? 3323851
关于积分的说明 10215999
捐赠科研通 3039020
什么是DOI,文献DOI怎么找? 1667747
邀请新用户注册赠送积分活动 798383
科研通“疑难数据库(出版商)”最低求助积分说明 758339