Effect of sodium methyl-silicate on the performance and structure of geopolymer

Lü, Shi-xiong; Wang, Meirong; He, Peigang; Sun, Xiuhua; Wang, Xiongyao; Tang, Dongyan; Jia, Dechang

doi:10.1016/j.matlet.2023.134893

Cited by 4 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has different structures and properties due to different silicon-aluminum ratios. When the ratio of silicon-aluminum reaches 2:1, the tetrahedral arrangement structure is the most reasonable and the best mechanical properties are achieved (Luo et al, 2023;Pratap et al, 2023). Some references showed that the commonly used raw materials of geopolymer cement are fly ash, metakaolin, coal gangue, and other high silicon aluminum and low calcium industrial wastes.…”

Section: Introductionmentioning

confidence: 99%

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

Dong,

Li,

Shi

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

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%.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Dong,

Li,

Shi

et al. 2023

Front. Mater.

View full text Add to dashboard Cite

show abstract

Neutron imaging of moisture transport, water absorption characteristics and strength properties for fly ash/slag blended geopolymer mortars: Effect of drying temperature

El Abd,

Taman,

Behiry

et al. 2024

Construction and Building Materials

View full text Add to dashboard Cite

Facile preparation and properties of foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer composites

Yan,

He,

Zhang

et al. 2024

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In order to reuse the multiple solid waste and improve the porosity of geopolymer composites, a unique foaming process was developed to fabricate novel green foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer (HGMs/FSGP) composites. A thorough investigation was carried out on the synergic effects of cetyltrimethylammonium bromide (CTAB), hydrogen peroxide (H2O2) and HGMs on the microstructure, strength and thermal conductivity. Results showed that the foamed HGMs/FSGP composites with the amorphous structure could be fabricated by foaming combined with HGMs at room temperature. The density of the samples changed from 1.16 to 0.47 g/cm3 with 1–5 wt.% H2O2. The acceptable compressive strength (0.71–15.05 MPa) of the HGMs/FSGP composites was attributed to the fractured HGMs, the good bond between HGMs and geopolymer matrix, and crack deflection across the HGMs. With proper H2O2 and HGMs, the composites obtained their lowest thermal conductivity of 0.116 W/(m⋅K), which could find use in insulation fields.

show abstract

Effect of sodium methyl-silicate on the performance and structure of geopolymer

Cited by 4 publications

References 14 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

Neutron imaging of moisture transport, water absorption characteristics and strength properties for fly ash/slag blended geopolymer mortars: Effect of drying temperature

Facile preparation and properties of foamed fly‐ash/slag‐based hollow glass microspheres/geopolymer composites

Contact Info

Product

Resources

About