Mechanical and durability properties of metakaolin blended with slag geopolymer mortars used for pavement repair

Chen, Keyu; Wu, Dazhi; Yi, Ming; Cai, Qimao; Zhang, Zhenying

doi:10.1016/j.conbuildmat.2021.122566

Cited by 62 publications

(14 citation statements)

References 54 publications

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“…improve the filling capacity of GGRM, resulting in a marginal decrease in compressive strength at lower replacement rates, an observation that aligns with the results of Yoo et al (2022). Conversely, GGR's unique attributes, including its irregular shape, high specific surface area, and lamellar structure compared to SO, as detailed (K. Chen et al, 2021), make tight integration difficult, ultimately resulting in a substantial decrease in compressive strength at high replacement rates of GGR within GGRM.…”

Section: Mechanical Strengthsupporting

confidence: 67%

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Eco‐friendly geopolymer mortar prepared from geopolymer waste: Mechanical and thermal properties

Bourzik,

Baba,

Akkouri

2023

Environmental Quality Mgmt

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As the demand for sustainable construction practices increases, alternative materials are being explored to reduce waste and carbon emissions. This study investigates the feasibility of utilizing recycled geopolymer binder as a substitute for ordinary sand in the production of geopolymer mortar. The study examines the effects of various replacement rates of recycled geopolymer on the physical, mechanical, and thermal properties of the geopolymer mortar. The results indicate that geopolymer mortar incorporating recycled geopolymer binder as a replacement for ordinary sand exhibits similar mechanical properties to traditional geopolymer mortar, with minor decreases in compressive and flexural strength as the replacement rate increased. The geopolymer mortar also demonstrated lower thermal conductivity than traditional mixes, resulting in increased thermal insulation. These findings suggest that using recycled geopolymer binder as a replacement for ordinary sand in geopolymer mortar production could be a promising approach for sustainable construction practices.

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Section: Mechanical Strengthsupporting

confidence: 67%

“…(2022). Conversely, GGR's unique attributes, including its irregular shape, high specific surface area, and lamellar structure compared to SO, as detailed (K. Chen et al., 2021), make tight integration difficult, ultimately resulting in a substantial decrease in compressive strength at high replacement rates of GGR within GGRM.…”

Section: Resultsmentioning

confidence: 99%

Eco‐friendly geopolymer mortar prepared from geopolymer waste: Mechanical and thermal properties

Bourzik,

Baba,

Akkouri

2023

Environmental Quality Mgmt

View full text Add to dashboard Cite

show abstract

“…In particular, the temperature effect compared with the destructive and nondestructive testing on CS analysis is one such area of research. It was also observed from recent literature that the temperature effect plays vital role in the enhancement of geopolymerization [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 94%

“…The activator dissolves the silica, resulting in an increase in the structural strength [ 16 ]. The activator interacts with less silica content during polymerization than acute necessary for reaction, resulting in low levels of residual alkali in the pore space [ 17 , 18 , 19 , 20 ]. The mechanistic differences between hydroxide and silica in polymer formation linked to the changes that occur during gel precipitation, with hydroxide-activator gels forming mostly in the presence of FA [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Destructive and Nondestructive Analysis for GGBS Based Geopolymer Concrete and Its Statistical Analysis

et al. 2022

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Geopolymer is the alternative to current construction material trends. In this paper, an attempt is made to produce a sustainable construction composite material using geopolymer. Ground granulated blast furnace slag (GGBS)-based geopolymer concrete was prepared and tested for different alkaline to binder ratios (A/B). The effect of various temperatures on compressive strength properties was assessed. The cubes were exposed to temperature ranging from 50 to 70 °C for a duration ranging from 2 to 10 h, and the compressive strength of the specimens was analyzed for destructive and non-destructive analysis and tested for 7, 28, and 90 days. The obtained compressive strength (CS) results were analyzed employing the probability plot (PP) curve, distribution overview curve (DOC), probability density function (PDF), Weibull, survival, and hazard function curve. Maximum compressive strength was achieved for the temperature of 70 °C and an A/B of 0.45 for destructive tests and non-destructive tests with 44.6 MPa and 43.56 MPa, respectively, on 90 days of testing. The survival and hazard function curves showed incremental distribution characteristics for 28 and 90 days of testing results with a probability factor ranging from 0.8 to 1.0.

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“…A large number of needle-like (AFt) and Ca(OH) 2 /CaCO 3 particles can be observed on the surface of OPC-stabilized sandy silt as well as the strong bonds between the gelatinous C-S-H gel and matrix, as shown in Figure 11a. An alkaline solution in the pore space leached the soluble aluminosilicate composition available from fly ash (pozzolanic reaction), resulting in it coexistence with N-A-S-H and C-S-H gels [29][30][31]. When gypsum was added (see Figure 11c), the acicular AFt was bigger and denser than the unadulterated AFt, which could better fill the void in the later period.…”

Section: Fesem Micrographs Analysismentioning

confidence: 99%

Influence of Some Additives on the Properties of OPC Solidified Sandy Silt

Chen

Zhang

et al. 2021

Applied Sciences

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The ordinary Portland cement (OPC)-based solidification process is used extensively to reinforce soils due to its available and good bonding properties. Alternative products are used in cementitious materials to enhance the strength and to reduce OPC consumption. In this study, the effect of additive type and mass fraction on the microstructure and mechanical properties of solidified sandy silt are investigated. There are four types of additives (gypsum, lime, clay particles, and fly ash) at mass fractions of 2, 3, and 4% that are considered in order to study their mechanical properties (unconfined compression, indirect tensile, flexural strength, and compressive resilient modulus) at 7, 14, 28, 60, and 90 days. The optimal contents of additive gypsum, clay particles, and fly ash are determined to be 2%, 4%, and 4%, respectively. Such improvement of additive-modified OPC solidified sandy silt is due to the formation of the crystalline compound or the gradation composition improvement via field emission scanning electron and X-ray diffraction analysis.

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Mechanical and durability properties of metakaolin blended with slag geopolymer mortars used for pavement repair

Cited by 62 publications

References 54 publications

Eco‐friendly geopolymer mortar prepared from geopolymer waste: Mechanical and thermal properties

Eco‐friendly geopolymer mortar prepared from geopolymer waste: Mechanical and thermal properties

Assessment of Destructive and Nondestructive Analysis for GGBS Based Geopolymer Concrete and Its Statistical Analysis

Influence of Some Additives on the Properties of OPC Solidified Sandy Silt

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