Effect of ground quartz sand on properties of high-strength concrete in the steam-autoclaved curing

Yang, Qi; Zhang, Shuqing; Huang, Shiyuan; He, Yaohui

doi:10.1016/s0008-8846(00)00395-1

Cited by 56 publications

(20 citation statements)

References 1 publication

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“…The reduction in the compressive strength after autoclave curing can be explained by the formation of crystalline α-C 2 SH which is associated with high porosity and less uniformity of the final products. This finding is in conformity with the literature (Yang et al 2000;Mindess, Young 1981). The results also show that, under autoclave curing cement can be substituted by ground DS up to 40% without significant loss in the compressive strength.…”

Section: Compressive Strength Of Mortarsupporting

confidence: 94%

“…Metakaolin and rice husk ash were obtained by clacination of kaolin clay and burning of rice husk under controlled temperature, respectively (Sabir et al 2001;Chandrasekhar et al 2003). High strength concrete could be achieved by incorporating ground quartz sand and fine stone dust as a partial cement replacement in an autoclave curing system (Jaafar et al 2002;Yang et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Use of Fine Ground Dune Sand as a Supplementary Cementing Material

Alhozaimy

Alawad

Jaafar

et al. 2014

Journal of Civil Engineering and Management

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Abstract. The process of Portland cement production is associated with high consumption of energy and resources. Therefore, there is a need to replace the Portland cement with environmental friendly materials. This study was conducted to determine the feasibility of using ground dune sand as cement replacement materials under different curing conditions. Portland cement was replaced by ground dune sand at five levels of replacement (0-40% by weight). The compressive strength of mortar under standard and autoclave curing conditions and the influence of different autoclave temperatures and durations were investigated. The microstructure of selected mixtures was analyzed by XRD and SEM. Results showed that the compressive strength under the standard curing decreased as the level of replacement increased. However, under autoclave curing compressive strength increased as the content of ground dune sand increased. XRD and SEM revealed the absence of calcium hydroxide and the formation of secondary calcium silicate hydrate. The improvement of compressive strength and the absence of calcium hydroxide under autoclave curing indicated that the pozzolanic reaction between silica of dune sand and calcium hydroxide occurred.Keywords: dune sand, autoclave curing, pozzolanic materials, compressive strength, XRD, SEM.

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Section: Compressive Strength Of Mortarsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Use of Fine Ground Dune Sand as a Supplementary Cementing Material

Alhozaimy

Alawad

Jaafar

et al. 2014

Journal of Civil Engineering and Management

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“…The chamber temperature was increased from room temperature to 182 ± 3°C within 1 h. Consequently, the pressure was increased from atmospheric pressure to 1.0 MPa. The adopted autoclave conditions (temperature and pressure) are similar to those used by Yang et al (2000). The temperature and pressure were kept constant at 182 ± 3°C and 1.0 MPa for 5 h, then the autoclave heater was turned off and the chamber was allowed to cool naturally.…”

Section: Sample Preparationmentioning

confidence: 99%

Effect of Autoclave Curing on the Microstructure of Blended Cement Mixture Incorporating Ground Dune Sand and Ground Granulated Blast Furnace Slag

Alawad

Alhozaimy

Jaafar

et al. 2015

International Journal of Concrete Structures and Materials

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Investigating the microstructure of hardened cement mixtures with the aid of advanced technology will help the concrete industry to develop appropriate binders for durable building materials. In this paper, morphological, mineralogical and thermogravimetric analyses of autoclave-cured mixtures incorporating ground dune sand and ground granulated blast furnace slag as partial cementing materials were investigated. The microstructure analyses of hydrated products were conducted using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), differential thermal analysis (DTA), thermo-graphic analysis (TGA) and X-ray diffraction (XRD). The SEM and EDX results demonstrated the formation of thin plate-like calcium silicate hydrate plates and a compacted microstructure. The DTA and TGA analyses revealed that the calcium hydroxide generated from the hydration binder materials was consumed during the secondary pozzolanic reaction. Residual crystalline silica was observed from the XRD analysis of all of the blended mixtures, indicating the presence of excess silica. A good correlation was observed between the compressive strength of the blended mixtures and the CaO/SiO 2 ratio of the binder materials.

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“…GP has feeble pozzolanic reactivity at early stage, which mainly occurs at later stage. The pozzolanic reactivity of GP needs to be under certain excitation conditions, such as enough alkali, thermal, and physical conditions [17]. In this experiment, the pozzolanic reactivity of GP is excited by an alkaline environment produced by cement hydration.…”

Section: Strengthmentioning

confidence: 99%

The Role of Various Powders during the Hydration Process of Cement-Based Materials

Liu

Wang

Wei

2017

Advances in Materials Science and Engineering

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The role of various powders including glass powder (GP), limestone powder (LP), and steel slag powder (SSP) during the hydration process of cement-based materials was investigated by using X-ray diffraction (XRD), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), and strength tests. GP has adverse impact on early strength, but the pozzolanic reaction at later stage enhances the strength development greatly. LP can significantly improve early strength. SSP has a good contribution to the early and later strength of the paste when its content is less than 15%. GP has little effect on the kind of hydration products but relatively large effects on the quantity. Calcium hydroxide (CH) content of GP paste decreases over curing age gradually, which is different from pure cement paste because its pozzolanic activity consumes more CH than that generated from the cement hydration. SSP and LP mainly play a role of filling effect at early stage. Nucleating effect of LP also promotes the early hydration of cement. The hydration of LP occurs at later stage and forms the calcium carboaluminate hydrates. The hydration of SSP is relatively slow, which generates CH at later stage and is effective in the strength development.

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Effect of ground quartz sand on properties of high-strength concrete in the steam-autoclaved curing

Cited by 56 publications

References 1 publication

Use of Fine Ground Dune Sand as a Supplementary Cementing Material

Use of Fine Ground Dune Sand as a Supplementary Cementing Material

Effect of Autoclave Curing on the Microstructure of Blended Cement Mixture Incorporating Ground Dune Sand and Ground Granulated Blast Furnace Slag

The Role of Various Powders during the Hydration Process of Cement-Based Materials

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