Experimental Research on the Properties and Formulation of Fly Ash Based Geopolymer Grouting Material

Zeng, Qingwei; Gao, Peiwei; Li, Kuan; Dong, Guoqing; Jin, Guanglai; Sun, Xueqing; Zhao, Jingwei; Chen, Lifeng

doi:10.3390/buildings12050503

Cited by 5 publications

(5 citation statements)

References 30 publications

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“…Too much content of silicate lump is also undesirable because of the formation of a large amount of alkalis, which leads to a significant deterioration in water resistance and other vital operational properties of artificial stone materials [19,20,[36][37][38].…”

Section: Compressive Strengthmentioning

confidence: 99%

Non-Cement Building Materials from Volcanic Rock Extraction Waste

Arzumanyan,

Muradyan,

Arzumanyan

et al. 2024

Buildings

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This work presents the types of waste of Armenian volcanic aluminosilicate tuff rocks extraction, as a component of the raw material of non-cement, artificial stone materials, the technical possibilities of their use, and the results of experiments for meeting the indicators of physical and mechanical characteristics of natural stone. Preliminary orientational experimental studies have specified the proportions of the raw materials in the compositions, the connections between the preparation of mixtures, the compaction of samples, and the shortest possible heat treatment regimes at temperatures up to 200 °C. Non-cement artificial stones were developed using tuff waste, with filler–composite binder ratios of 75/25 and 70/30, and a water/solid mass ratio of 0.10-to-0.12%. After 9 h of heat treatment, the density, water absorption, and compressive strength of non-cement artificial stone materials were determined. The results showed that these materials outperformed natural stone materials from the same deposits, in terms of the same physical and mechanical characteristics. The use of tuff waste resulted in increased densities, from 10.5 to 39%, decreased water absorption by 2 to 2.5 times, and increased compressive strength of non-cement artificial stone materials, from 15 to 30% compared to natural tuff stones. X-ray diffraction and SEM image studies were also carried out for the obtained non-cement artificial stones. The novelty in the developed technology of obtaining stone materials primarily revolves around the mixture preparation technology by using tuff waste materials and low-temperature heat treatment.

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Section: Compressive Strengthmentioning

confidence: 99%

Non-Cement Building Materials from Volcanic Rock Extraction Waste

Arzumanyan,

Muradyan,

Arzumanyan

et al. 2024

Buildings

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“…Bouchelaghem et al [13], meanwhile, employed the method of periodic structure homogenization (HPS) to establish the changes in effective permeability energy in the presence of cement-grout percolation. Zeng et al [14] investigated the impact of all components of geopolymer grouting material on material properties, leading to significant improvements in the material properties achieved. Gullu et al [15] employed nano silicon to modify Poland cement grout, successfully enhancing its rheology and the strength of the consolidated body.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Injectability of Infiltration Grouting in Surface Moraine of Pulang Copper Mine

Liu,

Sun,

Feng

et al. 2024

Water

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In order to effectively reduce the risk of underground debris flow, surface moraine is solidified and modified by using grouting technology to realize the change in fine-grained moraine from “powder” to “block” to change the source conditions of underground debris flow and to reduce the risk of moraine from the root. In this paper, the effects of grouting pressure, porosity, and pore diameter on the spillability of moraine are investigated experimentally. The results show that the grouting depth increases linearly with increasing sample porosity. For the same sample density, the grouting pressure is proportional to the grouting depth. As the pore diameter of the sample increases, the longitudinal grouting depth of the sample increases, but the transverse diffusion distance decreases. The chemical grout in the moraine is mainly split-infiltration grouting mode. The present research results can provide effective support for the prevention and control of underground debris flow in Pulang Copper Mine.

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“…Some scholars have summarized the composition of geopolymer grouting materials and the way of enhancing the mechanical properties, which are in terms of raw materials, matching ratios and admixtures [ 21 ]. In order to further study the mechanism of influence of mechanical properties, many scholars have analyzed the microstructure of fly ash geopolymer grouting materials by means of XRD and SEM, showing that the incorporation of slag could improve the pore size distribution and generate a large number of sodium silica-aluminate and calcium silicate gels, which are conducive to the development of strength [ 22 ]. The appropriate amount of fly ash content is also beneficial to reduce the cracks generated by geopolymer hardening, making the structure more uniform, and improving the compressive strength of the geopolymer [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Fly Ash-Slag Based Geopolymer for Repair of Road Subgrade Diseases

Dang

Zhang

et al. 2023

Polymers

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Fly ash-slag-based geopolymer is a grouting material with good fluidity and excellent mechanical and eco-friendly properties. The geopolymer can react chemically with the inert minerals of road subgrade under alkali excitation to form a good interfacial bond between road subgrade; therefore, it is suitable for the repair of weak road sections. In order to solve the problems such as the difficulty to store and transport the liquid activator of existing geopolymer grouting materials and to study the unclear mechanism of the influence factors on the fluidity and mechanical properties of geopolymer; the research on the mechanical properties of fly ash-slag based geopolymer was carried out in this paper. Experiments on the preparation of geopolymer and research on different ash-slag ratios under solid alkali excitation were studied. The influence of slag content and solid alkali content (NaOH, Na2SiO3) on the fluidity, compressive and flexural strength of fly ash-slag-based grouting materials was also researched on the basis of single-factor gradient tests. The results showed that the slurry fluidity decreased but the compressive strength gradually increased when the content of slag was increased from 20% to 50%. With the increase in alkali content (NaOH: 2–5%; sodium silicate: 0–6%), the slurry fluidity decreased and the compressive strength increased and then decreased. Combined with the analysis of the test results of Scanning Electron Microscopy (SEM), the microscopic structures of mechanical properties of geopolymer were investigated. Lastly based on ridge regression theory, a regression model was established to predict the mechanical properties of fly ash-slag-based geopolymer. The results indicate that fly ash-slag-based geopolymer has good mechanical properties and fluidity with proper contents of slag and alkali activator, which provide a reference for experiment research and engineering application.

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Experimental Research on the Properties and Formulation of Fly Ash Based Geopolymer Grouting Material

Cited by 5 publications

References 30 publications

Non-Cement Building Materials from Volcanic Rock Extraction Waste

Non-Cement Building Materials from Volcanic Rock Extraction Waste

Experimental Study of the Injectability of Infiltration Grouting in Surface Moraine of Pulang Copper Mine

Mechanical Properties of Fly Ash-Slag Based Geopolymer for Repair of Road Subgrade Diseases

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