Drying shrinkage of one-part alkali-activated slag concrete

Sadeghian, Golnaz; Behfarnia, Kiachehr; Teymouri, Mohammad

doi:10.1016/j.jobe.2022.104263

Cited by 34 publications

(15 citation statements)

References 66 publications

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“…This type of sand is chemically inert and has SiO 2 content of over 95 wt% [107]. Several types of coarse aggregates were used in one-part AAC, including granite [90], basalt [108], limestone [109], dolomite [110], clay granules [111], and IMT waste [103].…”

Section: Aggregatesmentioning

confidence: 99%

“…FAbased one-part AA mortars had lower drying shrinkage values when compared to their GGBS-based counterparts using the same activator and cured in the same environment [93]. The finer pore structure of GGBS-based mixtures, compared to FA-based systems, causes higher capillary stresses, and this ultimately results in higher drying shrinkage values [93,109]. It was shown recently that the drying shrinkage of GGBS-based one-part AAC was about 3.5-5.5 times that of OPC-based CCM [109], while the drying shrinkage of FA-, GGBS-and albite-based one-part AA paste was twice that of OPC-based pastes [127].…”

Section: Shrinkagementioning

confidence: 99%

“…The finer pore structure of GGBS-based mixtures, compared to FA-based systems, causes higher capillary stresses, and this ultimately results in higher drying shrinkage values [93,109]. It was shown recently that the drying shrinkage of GGBS-based one-part AAC was about 3.5-5.5 times that of OPC-based CCM [109], while the drying shrinkage of FA-, GGBS-and albite-based one-part AA paste was twice that of OPC-based pastes [127]. The addition of SF by 15% of binder weight to GGBS-based one-part AAC led to a significant reduction in the drying shrinkage by as much as 32% [109].…”

Section: Shrinkagementioning

confidence: 99%

See 2 more Smart Citations

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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Section: Aggregatesmentioning

confidence: 99%

Section: Shrinkagementioning

confidence: 99%

Section: Shrinkagementioning

confidence: 99%

See 1 more Smart Citation

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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“…As the water absorption rate by the saturated surface dry state of the desert sand was obviously lower than that of artificial sand in this study (Table 1), the substitution of desert sand would not increase the total porosity of the aggregate. Some mineral additions, such as silica fume, would also accelerate the concrete shrinkage [34,35]. In Figure 12a, b, c, the drying shrinkage of the concrete decreased as the concrete strength grade increased.…”

Section: Drying Shrinkage Of the Das Concretementioning

confidence: 98%

Effects of Desert Sand Substitution on Concrete Properties Using Desert Sand-Doped Quartz Sand as the Fine Aggregate

Liao¹

2022

Ceramics - Silikaty

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As governments are increasingly attaching more importance to environmental protection, many policies and regulations are being promulgated to restrict or prohibit river sand extraction. Thus, there is a growing tendency for concrete production to use desert sand-doped artificial sand as the fine aggregate. This paper investigated the microstructure, mechanical properties, durability, and volume stability of concrete with desert sand and artificial sand. In the study, the strength grades of concrete ranged from C30 to C100, while the substitution ratios of the desert sand for the artificial sand ranged from 0 % to 100 %. The results showed that a high substitution ratio of desert sand increased the concrete porosity and extended the interface zone width. The concrete strength generally decreased as the desert sand substitution ratio increased, however, for the C50 and C60 strength grades, concrete with 20 % desert sand had minor positive effects. Basically, as the desert sand substitution ratio increased, the Cl-penetration resistance and frost resistance tended to be weaker, although there were a few exceptions. High substitution ratios of desert sand were also not good for the sulfate attack resistance of concrete. In most cases, concrete with 20 % desert sand shrank more slowly than concrete without desert sand. These conclusions provide the experimental support for the promotion of desert sand applications in the concrete industry.

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“…A product of such reactions, calcium salts, will reduce the compressive and flexural strength of OPC concrete. Alkali-activated concrete (AAC) has been considered a potential replacement for OPC concrete and one of the methods to produce more durable and environmentally friendly concrete [ 7 , 8 , 9 , 10 , 11 , 12 ]. This is due to the high chemical resistance of their alternative binders compared to traditional cementitious binders [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Mixture Proportion on the Performance of Alkali-Activated Slag Concrete Subjected to Sulfuric Acid Attack

et al. 2022

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Long-term deterioration and durability concerns in harsh environments with acidic attacks are considered as the weaknesses of ordinary Portland cement (OPC) concrete. Although the performance of alkali-activated slag concrete (AASC) has been reported to be superior in acidic environments, there is a poor understanding regarding the impacts of diverse mix design parameters on AASC durability in an acidic environment. This research aims to understand the impact of mix design parameters on the durability of AASC in the sulfuric acid (H2SO4) environment with pH = 3. The type of alkaline solution, the molarity of alkaline solutions, the weight ratio of alkaline solutions to slag, and the weight ratio of NaOH to Na2SiO3 are mix design parameters investigated in this study. The compressive strength reduction and weight loss were monitored from early ages up to 180 days. Moreover, an OPC concrete sample was produced as a reference.

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Drying shrinkage of one-part alkali-activated slag concrete

Cited by 34 publications

References 66 publications

One part alkali activated materials: A state-of-the-art review

One part alkali activated materials: A state-of-the-art review

Effects of Desert Sand Substitution on Concrete Properties Using Desert Sand-Doped Quartz Sand as the Fine Aggregate

The Effect of Mixture Proportion on the Performance of Alkali-Activated Slag Concrete Subjected to Sulfuric Acid Attack

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