Cargando…

Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue

Effective foundation reinforcement treatment is essential for modern large and complex infrastructure, while it is significant for developing new green high-performance materials for foundation reinforcement. This study investigates a new green concrete by using high volume fly-ash and coal gangue a...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Linhao, Long, Guangcheng, Ma, Kunlin, Ma, Hongwei, Wang, Wenbing, Zhang, Cheng, Xie, Youjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040594/
https://www.ncbi.nlm.nih.gov/pubmed/32024299
http://dx.doi.org/10.3390/ma13030664
_version_ 1783501022294966272
author Li, Linhao
Long, Guangcheng
Ma, Kunlin
Ma, Hongwei
Wang, Wenbing
Zhang, Cheng
Xie, Youjun
author_facet Li, Linhao
Long, Guangcheng
Ma, Kunlin
Ma, Hongwei
Wang, Wenbing
Zhang, Cheng
Xie, Youjun
author_sort Li, Linhao
collection PubMed
description Effective foundation reinforcement treatment is essential for modern large and complex infrastructure, while it is significant for developing new green high-performance materials for foundation reinforcement. This study investigates a new green concrete by using high volume fly-ash and coal gangue aggregates, which is expected to apply for foundation treatment of modern infrastructure with high loading-bear ability. In this experiment, 12 mix proportions of fly ash coal gangue mixture (the material name, abbreviated FGM) were designed, and its mechanical properties and durability performance were investigated. The mechanical properties of FGM include compressive strength, dynamic elastic modulus, dynamic shear modulus, Poisson’s ratio, and the stress–strain behaviors. The durability performance was evaluated by the parameters of acid resistance, which simulated an acid circumstance. After that, the environmental effects about carbon emission of this material were also investigated. Results show that the FGM with 84.6% wastes utilizing rate is a cost-effective material for foundation reinforcing treatment. Its compressive strength at 28 days and 60 days can reach more than 8 MPa and 10 MPa, respectively. After being immersed in the acid environment for 140 days, the mass loss (%) of the material could be under 3.5%. The greenness shows that the e-CO(2) indices of FGM are lower than 20 kg/MPa·m(3), and the e-energy indices are at below 150 MJ/MPa·m(3). FGM has the advantages of acid resistance, waste recycling, and lower carbon emissions than the previous methods for foundation improvement.
format Online
Article
Text
id pubmed-7040594
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-70405942020-03-09 Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue Li, Linhao Long, Guangcheng Ma, Kunlin Ma, Hongwei Wang, Wenbing Zhang, Cheng Xie, Youjun Materials (Basel) Article Effective foundation reinforcement treatment is essential for modern large and complex infrastructure, while it is significant for developing new green high-performance materials for foundation reinforcement. This study investigates a new green concrete by using high volume fly-ash and coal gangue aggregates, which is expected to apply for foundation treatment of modern infrastructure with high loading-bear ability. In this experiment, 12 mix proportions of fly ash coal gangue mixture (the material name, abbreviated FGM) were designed, and its mechanical properties and durability performance were investigated. The mechanical properties of FGM include compressive strength, dynamic elastic modulus, dynamic shear modulus, Poisson’s ratio, and the stress–strain behaviors. The durability performance was evaluated by the parameters of acid resistance, which simulated an acid circumstance. After that, the environmental effects about carbon emission of this material were also investigated. Results show that the FGM with 84.6% wastes utilizing rate is a cost-effective material for foundation reinforcing treatment. Its compressive strength at 28 days and 60 days can reach more than 8 MPa and 10 MPa, respectively. After being immersed in the acid environment for 140 days, the mass loss (%) of the material could be under 3.5%. The greenness shows that the e-CO(2) indices of FGM are lower than 20 kg/MPa·m(3), and the e-energy indices are at below 150 MJ/MPa·m(3). FGM has the advantages of acid resistance, waste recycling, and lower carbon emissions than the previous methods for foundation improvement. MDPI 2020-02-02 /pmc/articles/PMC7040594/ /pubmed/32024299 http://dx.doi.org/10.3390/ma13030664 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Linhao
Long, Guangcheng
Ma, Kunlin
Ma, Hongwei
Wang, Wenbing
Zhang, Cheng
Xie, Youjun
Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title_full Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title_fullStr Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title_full_unstemmed Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title_short Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
title_sort preparation of green low strength mixture for foundation reinforcement treatment by using fly ash and waste coal gangue
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040594/
https://www.ncbi.nlm.nih.gov/pubmed/32024299
http://dx.doi.org/10.3390/ma13030664
work_keys_str_mv AT lilinhao preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT longguangcheng preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT makunlin preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT mahongwei preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT wangwenbing preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT zhangcheng preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue
AT xieyoujun preparationofgreenlowstrengthmixtureforfoundationreinforcementtreatmentbyusingflyashandwastecoalgangue