Prediction of Torsional Strength for Very High Early Strength Geopolymer

Prachasaree, Woraphot; Hawa, Abideng

doi:10.5755/j01.ms.23.4.17280

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the ratio relationship between Si/Al in the reaction products, geopolymers can be divided into three types [30] formed by the polymerization of silicon-oxygen tetrahedron and aluminosilicate tetrahedron as raw materials in the alkaline environment [23]. Many studies demonstrate its excellent properties, such as high early strength, good volume stability, chemical corrosion resistance, permeability and high-temperature resistance [24][25][26][27], and excellent mechanical properties and durability [28].…”

Section: Chemical Composition Of Geopolymersmentioning

confidence: 99%

Activation Mechanism of Coal Gangue and Its Impact on the Properties of Geopolymers: A Review

et al. 2022

View full text Add to dashboard Cite

Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time. Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements. In this paper, the physical and chemical characteristics, including the heavy metal content, of coal gangue from different producing areas are described. Then, the mechanism of physical activation (mechanical and thermal activation), chemical activation, and compound activation of coal gangue are illustrated. The machinability, as well as the mechanical, microscopic, and toxicity consolidation properties of geopolymers prepared from coal gangue, are summarized and analyzed. The results indicate that the coal gangue geopolymers can have higher mobility and mechanical strength than cement-based composites by adjusting high calcium element material, alkali activator content, Na2SiO3 modulus, and curing condition. After physical activation, coal gangue is used in geopolymer preparation with a chemical activator (alkali excitation agent), which effectively forms a three-dimensional silicon aluminate polymer network. The pore structure is dense, the physical fixation and chemical bonding are strengthened, and the solidification and adsorption of heavy metal ions are improved. Further, it can also be applied to solidifying radioactive waste, which is following the future development direction.

show abstract

Section: Chemical Composition Of Geopolymersmentioning

confidence: 99%

Activation Mechanism of Coal Gangue and Its Impact on the Properties of Geopolymers: A Review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Several recent research works have been conducted on pure and fibre reinforced AAC performance under torsional forces [ 24 , 25 , 26 , 27 ]. To the author’s knowledge, there is also no study conducted on the post crack performance of purely fibre reinforced beams in torsional load to compare with conventional and hybrid reinforcements of both fibres and steel reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Torsional Behaviour of Steel Fibre Reinforced Alkali Activated Concrete

Lau

Htut²,

Melling³

et al. 2020

Materials

View full text Add to dashboard Cite

Nine alkali-activated concrete beams were produced and tested under pure torsional load to failure. The alkali-activated concrete beams were produced with following variables: (i) fibres only, (ii) conventionally reinforced or (iii) a hybrid of both fibres and conventional steel reinforcement. The fibres only beams were found to have approximately 20% higher cracking torque than conventionally reinforced beams. However, fibres only beams were observed to have lower post crack ductility and inconsistent post crack behaviour, in comparison to conventionally reinforced alkali-activated concrete (AAC) beams. On the other hand, the hybrid reinforcements in AAC beams were found to demonstrate more ductile post crack behaviour consistently of the beams tested. Hybrid reinforcement was also shown to have 20% and 25% improvement in cracking and ultimate torque compared to conventionally reinforced, which suggests that it is suitable for industrial applications to improve structure capacity. The ultimate torque results of the beams were compared to an analytical model that considered the contribution of fibres. It was found that the ultimate torque of the hybrid reinforced beam has good correlation with the model but overestimated conventionally reinforced beams.

show abstract

Prediction of Torsional Strength for Very High Early Strength Geopolymer

Cited by 2 publications

References 9 publications

Activation Mechanism of Coal Gangue and Its Impact on the Properties of Geopolymers: A Review

Activation Mechanism of Coal Gangue and Its Impact on the Properties of Geopolymers: A Review

Torsional Behaviour of Steel Fibre Reinforced Alkali Activated Concrete

Contact Info

Product

Resources

About