Influence of paste thickness on coated aggregates on properties of high-density sulphoaluminate cement concrete

Sun, Keke; Zhou, Xiangming; Gong, Chenchen; Ding, Yanyu; Lu, Lingchao

doi:10.1016/j.conbuildmat.2016.04.018

Cited by 18 publications

(3 citation statements)

References 33 publications

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“…The hardening processes can occur ambiguously and differ significantly when using a CSA cement clinker or an alite-containing cement clinker, with the mineralogical composition and basicity being two important indicators of the hydration and durability of the clinker [ 7 , 8 ]. Due to C 4 A 3

being very highly reactive, CSA cement has many advantages, including rapid setting, high early strength, glass fiber compatibility and sulfate corrosion resistance [ 9 , 10 ]. However, due to the high cost of procuring high-quality alumina sources, the large-scale application of CSA cement is still restricted [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Volume Deformation and Hydration Behavior of Ordinary Portland Cement/Calcium Sulfoaluminate Cement Blends

Ali

Sun

et al. 2023

Materials

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Blends of ordinary Portland cement (OPC) and calcium sulfoaluminate (CSA) cement can be used to adjust the properties of cement for specific applications. In this study, CSA cement was used as a shrinkage-compensating admixture to improve the hydration behavior and performance (compressive strength and drying shrinkage) of OPC; the expansion behavior of the blended cement mortar was evaluate based on the saturation index of ettringite. The experimental results showed that incorporating CSA cement resulted in a delayed effect on the hydration of C3S, shortened the induction periods of the blended cement and decreased the setting time. The CSA cement also improved the early compressive strength and drying shrinkage of the OPC due to its compact microstructure. The drying shrinkage of the OPC mortar decreased by 27.8% when 6% CSA cement was used, but the formation of microcracks due to expansion could negatively impact its late compressive strength development and associated pore structures of the blends when the replacement content of CSA cement exceeded 6 wt.%. The results relevant to the expansion behavior of the CSA cements could induce crystallization stress, enhancing its resistance against shrinkage cracking.

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Section: Introductionmentioning

confidence: 99%

Volume Deformation and Hydration Behavior of Ordinary Portland Cement/Calcium Sulfoaluminate Cement Blends

Ali

Sun

et al. 2023

Materials

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“…The rapid generation of Aft, AFm, and AH 3 causes SAC to have the advantages of fast strength growth and small volume shrinkage [19,20]. This result suggests that using SAC as the matrix can improve the early strength of SAC-based thermal energy storage material (SCTESM).…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties Characterization of Sulphoaluminate Cement Mortars Incorporating Phase Change Material for Thermal Energy Storage

et al. 2020

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Efficient use of solar energy by thermal energy storage composites and utilizing environmentally friendly cementitious materials are important trends for sustainable building composite materials. In this study, a paraffin/low density polyethylene (LDPE) composite shape-stabilized phase change material (SSPCM) was prepared and incorporated into a sulphoaluminate cement (SAC) mortar to prepare thermal energy storage mortar. The thermal and mechanical properties of SSPCM and a SAC-based thermal energy storage material (SCTESM) were investigated. The result of differential scanning calorimeter (DSC) analysis indicates that the latent heat of SCTESM is as high as 99.99 J/g. Thermogravimetric analysis demonstrates that the SCTESM does not show significant decomposition below 145 °C. The volume stability test shows the volume shrinkage percentage of the SCTESM is less than that of pure SAC mortar and far less than that of ordinary Portland cement mortar. The SCTESM has high early strength so that the compressive strength at 1-, 3-, and 7-day curing age is up to that at 28-day curing age of 67.5%, 78.3%, and 86.7%, respectively. Furthermore, a mathematical prediction model of the SCTESM compressive strength was proposed. The investigation of latent heat storage characteristics and the thermoregulating performance reveals that SCTESMs have the excellent capacity of heat storage and thermoregulating.

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“…The findings highlighted a negative relationship between mechanical strength and recycled aggregate content as well as a negative relationship between the w/b ratio and mechanical properties in the concrete mixtures, further supporting that the DMDA method significantly enhances the mechanical strength, durability, and stability of concrete. In order to design highdensity sulphoaluminate cement concrete (HDSC), Sun et al 23 modified the DMDA method using the Fuller curve to determine the optimal mix of HDSC components. In their investigation, the HDSC mixtures were designed using three different paste thicknesses (10,20, and 30 μm) and w/b ratios (0.25, 0.30, and 0.35).…”

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confidence: 99%

Densified mixture design algorithm: A novel mix design concept and its application for green concretes incorporating industrial by‐products

Nguyen

Limongan

Nguyen

et al. 2023

Env Prog and Sustain Energy

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Despite the fact that densified mixture design algorithm (DMDA) has been identified as a promising tool for green concrete mix design, its use in real practice has still been minimal worldwide. Due to the lack of precise information on DMDA computation in earlier studies, this work proposes DMDA including fly ash and ground granulated blast-furnace slag as a viable way to improve the long-term performance of green concrete. To encourage the use of DMDA, this study offers a detailed description of the DMDA mix design, as well as a step-by-step standard operating procedure and an empirical example of the computation. Assessments of the long-term performance of green mixtures (self-consolidating concrete and high-performance concrete) and ordinary Portland cement concrete (designed using the conventional method of American Concrete Institute, ACI) were made. Performances of the ACI (O6000 mixture) and DMDA concretes (S6000 and H6000 mixtures) were then compared in terms of compressive strength, elastic modulus, shrinkage, and creep strain. As a result, all of the concrete samples attained the target strength of above 41 MPa (6000 psi) after only 28 days. Moreover, compressive strength, elastic modulus, shrinkage, and creep strain increased significantly in all of the concretes over curing time. Importantly, the experimental results confirmed that both types of DMDA concrete exhibited higher compressive strength and better long-term performance than the ACI concrete under elastic modulus, creep, and shrinkage aspects.

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Influence of paste thickness on coated aggregates on properties of high-density sulphoaluminate cement concrete

Abstract: are larger than 1.0, the total porosity can be less than 7%, and the micropore (i.e. with 21 pore size less than 20nm) can be larger than 70%.

Cited by 18 publications

References 33 publications

Volume Deformation and Hydration Behavior of Ordinary Portland Cement/Calcium Sulfoaluminate Cement Blends

Volume Deformation and Hydration Behavior of Ordinary Portland Cement/Calcium Sulfoaluminate Cement Blends

Thermophysical Properties Characterization of Sulphoaluminate Cement Mortars Incorporating Phase Change Material for Thermal Energy Storage

Densified mixture design algorithm: A novel mix design concept and its application for green concretes incorporating industrial by‐products

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