Development of sustainable geopolymer materials made with ground geopolymer waste powder as renewable binder up to 100%

Wu, Huixia; Liang, Chaofeng; Yang, Dingyi; Ma, Zhiming

doi:10.1016/j.conbuildmat.2023.132746

Cited by 16 publications

(4 citation statements)

References 41 publications

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“…The results of XRD, SEM and EDS showed that the growth in strength of alkali-activated white PS geopolymer cement can be considered to be the result of the contribution of geopolymer gel and C-S-H gel. This is similar to the result of Sha (Sha et al, 2021;Han et al, 2023;Li et al, 2023;Mohammed and Yaltay, 2023;Shen et al, 2023;Wu et al, 2023). This study suggested that the strength of geopolymer cement containing active mineral additive can be divided into two parts.…”

Section: Tg/dtg Analysis Of the Hydration Products Of Alkali-activate...supporting

confidence: 89%

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

Dong,

Li,

Shi

et al. 2023

Front. Mater.

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Pisha sandstone (PS) is a unique geological structure in the Yellow River basin in China and is a general term for a rock interlayer composed of sandstone, sand shale, and muddy sandstone. The collapsibility of PS results in a high erosion rate and poor vegetation due to its low diagenetic potential and weak structural strength. This study showed that PS can be converted into geopolymer cement by mixing with a suitable alkali activator. PS was converted to geopolymer cement for construction to control soil erosion and conserve the soil and water in this area. Slag was used as a mineral additive to improve the performance of alkali-active PS geopolymer cement in this study. The influence of slag replacement level, NaOH dosages, and curing age on the compressive strength of alkali-activated PS was investigated. Scanning electron microscopy (SEM)/energy dispersive X-ray (EDS), thermogravimetric analyses (TG/DTG), and X-ray diffraction (XRD) were used to analyze the hydration products and microstructure of alkali-activated PS. The results showed that when the samples had 40 wt.% slag, 1.5 wt.% NaOH, and 4.0 wt.% Na2SiO3, their compressive strength could reach 82.0 MPa at 90 days. Compared with the samples with activator and without activator, the compressive strength increased by 6,664% and 9,011%, respectively. The hydration products were C-S-H gel, geopolymer gel, and calcium carbonate crystals. With 10 wt.% slag as a mineral additive, 1.5 wt.% NaOH, and 4 wt.% Na2SiO3 as an activator, the carbonation ratio of C-S-H gel was 49.3%.

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Section: Tg/dtg Analysis Of the Hydration Products Of Alkali-activate...supporting

confidence: 89%

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

Dong,

Li,

Shi

et al. 2023

Front. Mater.

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“…Due to the alarming pollution level and its consequences on the environment owing to the use of conventional building materials have resulted in a renewed interest in earth-based materials for construction Wu et al [16]. This research study aimed to assess the compressive strength of stabilized soil blocks incorporating coconut husk ash, rice husk ash, and seawater for wall construction, with the overarching goal of reducing construction expenses and contributing to environmental preservation through the utilization of waste materials.…”

Section: Discussionmentioning

confidence: 99%

“…These husks were then incinerated separately until they transformed into ash and cooled down. The alarming pollution level and its consequences on the environment owing to the use of conventional building materials have resulted in a renewed interest in earth-based materials for construction Wu et al [16] . The objective of improving the properties of these soil blocks is to achieve efficiency in terms of strength and cost-effectiveness, thereby expanding their application within the field of construction.…”

Section: Methodsmentioning

confidence: 99%

Geopolymerization Method to enhance the compressive strength of Stabilized Silty Clay Utilizing Coconut Husk Ash, Rice Husk Ash and Sea water for Wall Construction

Villapa

2024

E3S Web of Conf.

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Soil as one of the fundamental components in construction boasts versatile applications in various forms. Silty clay soil is commonly found in various natural environments including riverbanks, floodplains, and agricultural areas. On the other hand, Rice Husk and Coconut Husk are agricultural wastes which contribute to environmental pollution and landfill issues if not properly managed. The utilization of these materials is of significant interest as it has the potential to not only benefit the construction industry but also make meaningful contributions to the preservation of the natural environment. This paper studied the methods for Geopolymerization in enhancing the compressive strength of Stabilized Silty Clay Utilizing Coconut Husk Ash (CHA), Rice Husk Ash (RHA) and Sea water for Wall Construction. It determined the effects of CHA, RHA and Sea water on the strength of compressed earth blocks. There were three different treatments that were considered in this study and replicated three times for the determination of the compressive strength. The soil blocks were cured and tested in 7, 14 and 28th days using Universal Testing Machine (UTM). Results revealed that soil blocks stabilized with CHA, RHA and sea water is effective and can be used on component of partition on load bearing walls.

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“…The application of protective coatings to concrete surfaces is widely employed as a common method to prolong the lifespan of buildings and preserve the structural integrity of constructions within current engineering practices [ 9 , 10 , 11 , 12 ]. Geopolymer materials are a novel type of inorganic binder prepared through an alkali–silica/alumina reaction and are characterized by chemical resistance, strong adhesion, and environmental friendliness [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ], making them highly applicable in the formulation of protective coatings for concrete surfaces. In recent decades, extensive research has been conducted on the practical application of geopolymer coatings [ 7 , 22 , 23 , 24 , 25 , 26 ], with sagging identified as one of the significant issues encountered in current applications.…”

Section: Introductionmentioning

confidence: 99%

Improving Sag Resistance in Geopolymer Coatings Using Diatomite Filler: Effects on Rheological Properties and Early Hydration

Hu,

Jin,

Pang

et al. 2024

Materials

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The reduction in the rheological parameters and dissolution rate of precursors in geopolymer coatings during early hydration significantly contributes to sagging. This study aims to improve the sag resistance of these coatings by incorporating diatomite filler. Rheological testing was conducted to assess the impact of diatomite and its concentration on the yield stress, plastic viscosity, and thixotropy of the geopolymer coatings. The results indicated that diatomite’s large specific surface area and high reactivity have a significant influence on the rheological parameters and early dissolution rate of precursors. With a diatomite concentration of 1.1%, the coating exhibited a yield stress of 2.749 Pa and a plastic viscosity of 0.921 Pa·s, maintaining stability, homogeneity, and no sagging at a thickness of 600 μm. Furthermore, the highly active SiO2 in diatomite participates in the secondary hydration reaction of the geopolymer materials led to the formation of substantial C-(A)-S-H gel. This gel enhances internal interconnectivity within the coating, thereby improving its rheological and mechanical properties.

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Development of sustainable geopolymer materials made with ground geopolymer waste powder as renewable binder up to 100%

Cited by 16 publications

References 41 publications

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

Strength development and hydration products of alkali-activated Pisha sandstone geopolymer cement

Geopolymerization Method to enhance the compressive strength of Stabilized Silty Clay Utilizing Coconut Husk Ash, Rice Husk Ash and Sea water for Wall Construction

Improving Sag Resistance in Geopolymer Coatings Using Diatomite Filler: Effects on Rheological Properties and Early Hydration

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