Experimental research on expansive soil improved with granulated blast furnace slag

2015 ◽  
pp. 2717-2720
Author(s):  
Cheng Wang ◽  
Shulin Sun
Keyword(s):  
Blast Furnace ◽  
Experimental Research ◽  
Blast Furnace Slag ◽  
Expansive Soil ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

scholarly journals Novel Approach to the Treatment of Gypseous Soil-Induced Ettringite Using Blends of Non-Calcium-Based Stabilizer, Ground Granulated Blast-Furnace Slag, and Metakaolin

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5198
Author(s):  
Khaled Ibrahim Azarroug Ehwailat ◽  
Mohd Ashraf Mohamad Ismail ◽  
Ali Muftah Abdussalam Ezreig
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Expansive Soil ◽  
Soil Samples ◽  
Granulated Blast Furnace Slag ◽  
No Formation ◽  
Novel Approach ◽  
Furnace Slag ◽  
Gypseous Soil ◽  
Considerable Damage

Gypseous soil is one type of expansive soil that contains a sufficient amount of sulphate. Cement and lime are the most common methods of stabilizing expansive soil, but the problem is that lime-treated gypseous soil normally fails in terms of durability due to the formation of ettringite, a highly deleterious compound. Moisture ingress causes a significant swelling of ettringite crystals, thereby causing considerable damage to structures and pavements. This study investigated the suitability of various materials (nano–Mg oxide (M), metakaolin (MK), and ground granulated blast-furnace slag (GGBS)) for the stabilization of gypseous soil. The results showed soil samples treated with 20% M-MK, M-GGBS, and M-GGBS-MK to exhibit lower swelling rates (<0.01% change in volume) compared to those treated with 10% and 20% of lime after 90 days of curing. However, soil samples stabilized with 10% and 20% binder of [(M-MK), (M-GGBS), and (M-GGBS-MK)] exhibited higher strengths after 90 days of soaking (ranging from 0.96–12.8 MPa) compared to those stabilized with 10% and 20% lime. From the morphology studies, the SEM and EDX analysis evidenced no formation of ettringite in the samples stabilized with M-MK-, M-GGBS-, and M-GGBS-MK. These results demonstrate the suitability of M-MK, M-GGBS, and M-GGBS-MK as effective agents for the stabilization of gypseous soil.

scholarly journals Contribution to the requalification of Alkali-Silica reaction damaged concrete: particular respect to the slag effect

2018 ◽  
Vol 149 ◽  
pp. 01053
Author(s):  
Zineb Douaissia ◽  
Mouloud Merzoud
Keyword(s):  
Blast Furnace ◽  
Experimental Research ◽  
Blast Furnace Slag ◽  
Engineering Properties ◽  
Alkali Silica Reaction ◽  
Granulated Blast Furnace Slag ◽  
Test Methodology ◽  
Chemical Admixtures ◽  
Research Findings ◽  
Furnace Slag

A significant concern when designing durable concretes structures is the risk of alkali silkai reaction (ASR). The cracks formed by ASR increase the permeability of concrete, reduce the strength and lower the economic lifetime of concrete. The use of mineral and chemical admixtures to prevent expansion due to the alkali-silica reaction (ASR) was first reported 40 to 50 years ago. In this paper, a comprehensive experimental research was carried out to prevent the damages and to be able to improve in concrete structures with the reactive aggregates by using the ground granulated blast-furnace slag (GGBFS) in the mixtures. Furthermore, the engineering properties of blast-furnace slag and the test methodology used in the research were presented and the research findings were also discussed.

scholarly journals Contribution to the Valorization of Granulated Blast Furnace Slag in Soil Stabilization

2021 ◽  
Vol 31 (3) ◽  
pp. 134-151
Author(s):  
Sarah Djouimaa ◽  
Sabrina Missaoui ◽  
Naoual Handel ◽  
Madani Sid
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Soil Stabilization ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Environmental Benefits ◽  
Percentage Increase ◽  
Swelling Clay ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Abstract The treatment of expansive soil is generally the most effective process for the stabilization of swelling clay. In this work, we will investigate the influence of the treatment of an expansive soil using granulated blast furnace slag (GGBS) alone and granulated blast furnace slag activated by cement (GGBS/C) by mechanical, physical and chemical tests. The results obtained show an increased pH, an improved plasticity as well as a significant reduction in swelling potential and swelling pressure following a percentage increase in additives. In addition, a change in the adsorption of methylene blue molecules (VBs) and in the microstructure of the expansive soil is observed after treatment. Utilization of both GGBS alone and GGBS activated by cement has a significant effect on the behavior of the swelling clay but the GGBS activated by cement exhibits superior results. The use of GGBS in the stabilization of soil will have both economic and environmental benefits.

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