Static and dynamic mechanical properties of high early strength alkali activated slag concrete

Gao, Yuan; Xu, Jinyu; Bai, Erlei; Luo, Xin; Zhu, Jie; Nie, Liangxue

doi:10.1016/j.ceramint.2015.06.131

Cited by 39 publications

(10 citation statements)

References 26 publications

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“…Compared to the limited research on the strain rate effect of AAC, extensive studies have been conducted on OPCC. The strain rate effect of OPCC can be evaluated by the dynamic increase factor (DIF), which is equal to the ratio of dynamic strength/strain to static strength/strain, and can be predicted by the CEB-FIP model as follows: The results obtained by Feng et al [76], Luo et al [77,79], Gao et al [78], and Khandelwal et al [80] demonstrated that AAC was a strain-rate sensitive material and that DIF increased with the strain rate. The cracks in AAC subjected to quasi-static and low strain rate loads propagated mainly along the ITZ between the matrix and the coarse aggregates.…”

Section: Dynamic Mechanical Properties Of Alkali-activated Concretementioning

confidence: 99%

Mechanical properties of alkali-activated concrete: A state-of-the-art review

Ding

Dai

Shi

2016

Construction and Building Materials

332

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Alkali-activated concretes (AACs) are attracting increasing attention due to their potential as alternatives to ordinary Portland cement concrete (OPCC). This paper is a holistic review of current research on the mechanical properties of AAC including research on its compressive strength, tensile strength, elastic modulus, Poisson's ratio, stress-strain relationship under uniaxial compression, fracture properties, bond mechanism with steel reinforcement, dynamic mechanical properties, and high-temperature performance. Three types of AAC are reviewed: alkali-activated slag, alkali-activated fly ash, and alkali-activated slag-fly ash concretes. The applicability to AAC of design formulas found in codes of practice that were developed to estimate the basic mechanical performances of OPCC is also discussed. It is shown that, in general, AAC exhibits better bond performance with steel reinforcement and better strength performance after exposure to elevated temperatures than OPCC. For the other reviewed mechanical properties, the differences between AAC and OPCC largely depend on the proportions of raw materials in the concrete; specifically, the slag to fly ash ratio may be a very influential factor. As there is a trend to combine slag and fly ash in the production of AAC to achieve normal temperature curing and environmental friendliness, further research is deemed necessary to determine how the slag to fly ash ratio influences the fundamental mechanical properties of AAC and how this affects practical designs.

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Section: Dynamic Mechanical Properties Of Alkali-activated Concretementioning

confidence: 99%

Mechanical properties of alkali-activated concrete: A state-of-the-art review

Ding

Dai

Shi

2016

Construction and Building Materials

332

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“…However, the superior performance of AASC has not brought its wide application. First, although there are relevant industrial standards for GGBS [6,7], it is only used as an additive in the actual use process [8]. Secondly, the phase composition and chemical composition of slag vary greatly in different areas, which has a great impact on the strength of AASC [9].…”

Section: Introductionmentioning

confidence: 99%

Stress‐Strain Relationship of Steel Fiber Reinforced Alkali Activated Slag Concrete under Static Compression

Yuan

Guan

Shi

2021

Advances in Civil Engineering

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Stress-strain curve can accurately reflect the mechanical behavior of materials, and it is very important for structural design and nonlinear numerical analysis. Some cube and prism specimens were made to investigate the physical and mechanical properties of steel fiber reinforced alkali activated slag concrete (AASC); test results show that the strength, Young’s Elastic Modulus, and Poisson’s ratio all increase with the increase of steel fiber content. The steel fiber reinforced AASC shows an excellent postcracking behavior. Damage evolution parameter (D) was used to describe the formation and propagation of cracks, and continuum damage evolution model of steel fiber reinforced AASC was established by Weibull and Cauchy distribution. The establishing model can well describe the geometric characteristics of the key points of the concrete materials stress-strain curve. Finally, the accuracy of the model was verified by comparing the test stress-strain relationship curve of steel fiber reinforced AASC.

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“…[5,6] However, due to the variety in compositions in different raw materials, the geopolymers formed from them may also have different mechanical properties. Gao et al [11] examined the static and dynamic mechanical properties of alkali-activated slag concrete (AASC). Ground-granulated blast-furnace slag (GGBS) is a by-product obtained from iron industries.…”

Section: Introductionmentioning

confidence: 99%

“…Their results showed that there are strong correlations between the dynamic compressive strength and strain rate and between the energy absorption and stain rate. Gao et al examined the static and dynamic mechanical properties of alkali‐activated slag concrete (AASC). The results showed that the AASC has a high‐dynamic compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behaviors of Fly Ash–Ground‐Granulated Blast‐Furnace Slag–High‐Magnesium Nickel Slag‐Based Geopolymer Paste When Subjected to Impact Compressive Loadings

et al. 2019

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Reducing the emission of CO 2 into the atmosphere is a challenge due to rapid industrial development, particularly in developing countries. Ordinary Portland cement (OPC) is the second-most-consumed material just after water. It is estimated that the production of one ton OPC generates %0.87 ton CO 2 . Geopolymers are considered as the sustainable materials that possess similar or even better mechanical properties than OPC. Geopolymers are made from byproducts such as fly ash, furnace slag, and China clay. This article reports an experimental study on the dynamic mechanical behaviors of fly ash-groundgranulated blast-furnace slag-high-magnesium nickel slag (FA-GGBS-HMNS)based geopolymers when subjected to impact loading. The impact tests are performed using a split-Hopkinson pressure bar device. The test results show that both the dynamic compressive strength and ultimate strain of the FA-GGBS-HMNS-based geopolymer paste increase with increased strain rate. The failure modes are also found to be different in the specimens under different impact speeds.

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Static and dynamic mechanical properties of high early strength alkali activated slag concrete

Cited by 39 publications

References 26 publications

Mechanical properties of alkali-activated concrete: A state-of-the-art review

Mechanical properties of alkali-activated concrete: A state-of-the-art review

Stress‐Strain Relationship of Steel Fiber Reinforced Alkali Activated Slag Concrete under Static Compression

Dynamic Behaviors of Fly Ash–Ground‐Granulated Blast‐Furnace Slag–High‐Magnesium Nickel Slag‐Based Geopolymer Paste When Subjected to Impact Compressive Loadings

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