Wall materials based on complex binders and organic aggregate

Zakrevskaya, Lubov; Gavrilenko, Andrei; Andreeva, K. A.; Lubin, Petr; Kapush, Ilya; Udin, Igor

doi:10.1088/1757-899x/896/1/012083

Cited by 4 publications

(2 citation statements)

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“…The crystal-chemical composition of chrysotile closely resembles the magnesian binder derived from dolomite. It has very high tensile strength and alkali resistance [64]. Chrysotile has a tubular structure, and the tube-like, very long fibers are arranged laterally in an array [63], [66], [68].…”

Section: X-ray Diffraction Analysis Of Fly Ash and Ggbsmentioning

confidence: 99%

“…Chrysotile has a tubular structure, and the tube-like, very long fibers are arranged laterally in an array [63], [66], [68]. The inherent structural characteristics of chrysotile create a consistently compact and homogeneous structure in a binding material, thus contributing to its exceptional compressive and flexural strength [59], [60], [64].…”

Section: X-ray Diffraction Analysis Of Fly Ash and Ggbsmentioning

confidence: 99%

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Mitigation Measures of Swelling Characteristics in Alkali-Contaminated Red Earth using Fly Ash and GGBS Blends

Kumar Darapu,

Vindula

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Alkali contamination induces swelling in the inherently non-swelling soils, resulting in heave severely damaging the sub and superstructures. Stabilization measures must be taken in vulnerable areas to prevent such colossal losses. Considerable research has been conducted regarding the swelling behavior of soils contaminated with alkalis and the impact of subsequent stabilization techniques utilizing different industrial byproducts and pozzolanic materials. However, there is a paucity of such studies on the Red Earth (RE) of the Visakhapatnam region. Furthermore, limited attention was given to the effects of extremely low concentrations of alkalis on the swelling behavior of soils. RE in the study area of the Visakhapatnam region predominantly consists of quartz, kaolinite, and hematite. In phase 1 of the experimental analysis, RE was contaminated with a highly dilute NaOH solution (0.05 N), and the resulting swell characteristics were investigated. A free swell of 10% was observed. One-dimensional standard oedometer tests revealed an equilibrium swelling of 5.6%, indicating significant potential for substantial heave and subsequent damage. X-ray diffraction (XRD) analysis revealed the formation of natrolite and analcime zeolites with a hollow structure, which caused the swell. Peaks of silicate minerals like paragonite and ussingite were also observed, indicating the dissolution of authigenic minerals and new precipitations even at lower concentrations of NaOH. In phase 2, swell tests were conducted on a mixture of contaminated red earth (50% w/w), fly ash (25% w/w), and ground granulated blast furnace slag (GGBS, 25% w/w), and it was observed that the swelling was completely arrested. XRD analysis unveiled that even though siliceous zeolites were formed, the development of chrysotile, attapulgite, tobermorite, and dicalcium silicate effectively inhibited the swelling with their pozzolanic behavior.

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