Binary and ternary effects of ground dune sand and blast furnace slag on the compressive strength of mortar

Alhozaimy, Abdulrahman M.; Al‐Negheimish, Abdulaziz I.; Alawad, O.A.; Jaafar, Mohd Saleh; Noorzaei, J.

doi:10.1016/j.cemconcomp.2012.03.002

Cited by 39 publications

(21 citation statements)

References 25 publications

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“…The compressive strength decreases almost linearly as the CaO/SiO 2 ratio decreases (R 2 = 0.99). The literature review demonstrated that the optimum CaO/SiO 2 ratio for autoclave curing to achieve concrete strength is around unity (Alhozaimy et al 2012;Eilers et al 1983;Taylor 1997). In this study, the highest compressive strength achieved was 72 MPa (M2-AC) with a CaO/SiO 2 ratio of 0.74.…”

Section: Compressive Strengthmentioning

confidence: 73%

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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Section: Compressive Strengthmentioning

confidence: 73%

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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“…The adsorption capacity increases from 45 mL/g to 57 mL/g when the curing age increases from 7 days to 28 days (Figure 6a). One reason is that the pore structure of the hardened paste, and the interface between the pure cement and fly ash, are improved [28]. The second reason is that the low-calcium fly ash reacts with the calcium hydroxide of the cement hydration product, ever, as quartz powder is irregular and polygonal, this leads to the loose accumulation of hydration products compared to those of fly ash particles.…”

Section: Effect Of Fly Ash and Quartz Powder On The Pore Structure Of...mentioning

confidence: 99%

“…The adsorption capacity increases from 45 mL/g to 57 mL/g when the curing age increases from 7 days to 28 days (Figure 6a). One reason is that the pore structure of the hardened paste, and the interface between the pure cement and fly ash, are improved [28]. The second reason is that the low-calcium fly ash reacts with the calcium hydroxide of the cement hydration product, In summary, based on the results for the amount of adsorption/desorption, the surface area and the pore structure of samples, before the hydration age of 7 days, low-calcium fly ash and quartz powder play the same role in cement-based composites-namely, the physical filling of the micro-aggregate.…”

Section: Effect Of Fly Ash and Quartz Powder On The Pore Structure Of...mentioning

confidence: 99%

Action Time-Effect and Mechanism of Low-Calcium Fly Ash in Cement-Based Composites

et al. 2021

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This study was conducted in order to investigate when low-calcium fly ash plays a physical or chemical effect and what is the chemical effect proportion of low-calcium fly ash. Two types of low-calcium fly ash and quartz powder, with similar fineness as active and inert admixtures, were used as materials in this study. Under different water/binder ratios and hydration ages, the effects of the different types of admixtures and their dosages on the flexural and compressive strength of the composites were studied. X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption methods, in addition to an assessment of the degree of hydration of the fly ash, were employed to observe the hydration products at different ages, the microstructures of the hydration products, as well as their surface areas and pore size distributions. The results show that during the hydration period of 28 days, the low-calcium fly ash has a micro-aggregate filling physical effect. However, after 56 days, the hydration degree of fly ash begins to exceed 1%. This illustrates that the low-calcium fly ash has both the pozzolanic activity effect and micro-aggregate filling effect. In contrast, the low-calcium fly ash hydrated for 90 days is still dominated by the physical filling effect.

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“…The use of DS in the construction of buildings contributes to the development of the southern Algerian regions, which are extremely rich in DS. Many researchers recently (Nécira et al, 2017;Douara and Guettala, 2019;Al-Harthy et al, 2007;Bederina et al, 2007Bederina et al, , 2009Guettala and Mezghiche, 2011;Zeghichi et al, 2012;Belferrag et al, 2013;Yusuf and Olawumi, 2015;Alhozaimy et al, 2012aAlhozaimy et al, , 2012bAlhozaimy et al, , 2014Zaitri et al, 2014Zaitri et al, , 2018 were interested in using DS in the making of ordinary and innovative concrete. The DS is known by its great fineness, very tight granularity and high-water absorption (Ghrieb et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Using mixture design method to optimizing concretes characteristics made with binary and ternary sands

Attia

Guettala

Zaitri

2021

WJE

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Purpose The purpose of this paper is to implement the mathematical models to predict concretes physico-mechanical characteristics made with binary and ternary sands using a mixture design method. It is a new technique that optimizes mixtures without being obliged to do a lot of experiments. The goal is to find the law governing the responses depending on mixture composition and capable of taking into account the effect of each parameter separately and in interaction between several parameters on the characteristics studied. Design/methodology/approach Mixture design method was used for optimizing concretes characteristics and studying the effects of river sand (RS), dune sand (DS) and crushed sand (CS) in combinations of binary system and ternary on workability, the compressive and flexural strengths of concretes at 7 and 28 days. A total of 21 mixtures of concrete were prepared for this investigation. The modeling was carried out by using JMP7 statistical software. Findings Mixture design method made it possible to obtain, with good precision, the statistical models and the prediction curves of studied responses. The models have relatively good correlation coefficients (R2 = 0.70) for all studied responses. The use of binary and ternary mixtures sands improves the workability and their mechanical strengths. The obtained results proved that concrete, based on binary mixture C15, presents the maximum compressive strength (MCS) on 28 day with an improvement of around 20%, compared to reference concrete (C21). For ternary mixtures, MCS on 28 day was obtained for the mixture C10 with an improvement of around 15% compared to C21. Increase in compressive strength during the progress of hydration reactions was accompanied by an increase in the flexural strength, but in different proportions. Originality/value The partial incorporation of DS (= 40%) in the concrete formulation can provide a solution for some work in the southern regions of country. In addition, the CS is an interesting alternative source for replacing 60% of RS. The concrete formulation based on local materials is really capable of solving the economic and technical problems encountered in the building field, as well as environmental problems. Local resources therefore constitute an economic, technological and environmental alternative.

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Binary and ternary effects of ground dune sand and blast furnace slag on the compressive strength of mortar

Cited by 39 publications

References 25 publications

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

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

Action Time-Effect and Mechanism of Low-Calcium Fly Ash in Cement-Based Composites

Using mixture design method to optimizing concretes characteristics made with binary and ternary sands

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