Autoclaved slag-clinker-sand pastes surface area, pore structure and compressive strength

Mikhail, R. Sh.; Abo-El-Enein, S.A.; Abdel-Khalik, M.; Gabr, N.A.

doi:10.1016/0008-8846(78)90060-1

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Recent studies indicate that the wide pores affect the compressive strength more than microspores [15][16]. The strength is reduced markedly in presence of higher fraction of wide pores in the mortar paste; while micro pores, have a smaller effect on the reduction of compressive strength.…”

Section: Compressive Strengthmentioning

confidence: 99%

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

EL-Safty

Sadek

et al. 2006

The International Conference on Chemical and Environmental Engi

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Hardened ordinary Portland cement mortar pastes were prepared with different water / cement ratios within the range of 0.25 to 0.50 and cured for various time intervals up 28 days. At each hydration time the hardened specimens were, then, impregnated with different monomers; these are : castor oil (C.O), isocyanate and methyl methacrylate (MMA). Polymerization was carried out by subjecting the impregnated samples to different doses of γ-radiation where polyurethane (PU), polyurethane-methyl methacrylate copolymer were formed within the pore system. The influence of polymer impregnation of the various physico-mechanical characteristics of the resulting composites, namely, compressive strength, of the samples in connection with water cement ratio, radiation dose and curing period was discussed. Scanning electron microscopy (SEM) was employed to study the microstructural characteristics of the neat hardened OPC mortar pastes and their polymer-impregnated composites.

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Section: Compressive Strengthmentioning

confidence: 99%

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

EL-Safty

Sadek

et al. 2006

The International Conference on Chemical and Environmental Engi

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“…The aim of the present work, therefore, was to study the effects of these admixtures on the surface properties of the calcium silicate hydrates produced from the reaction of silica fume and calcium hydroxide. Mikhail et al (1978) have investigated the surface properties of autoclaved slag/cinder/sand pastes using both nitrogen gas and water vapour adsorption studies. In addition, the specific surface areas and total pore volumes of slag/lime and slag/quartz/lime pastes autoclaved at 181-213ºC were determined using nitrogen gas and water vapour as adsorbates.…”

Section: Introductionmentioning

confidence: 99%

Effect of Some Admixtures on the Surface Properties of the Hydration Products of Silica Fume/Ca(OH)₂ Mixtures

Hekal¹,

Mousa

2000

Adsorption Science & Technology

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ABSTRACT:The effect of sodium naphthalene formaldehyde sulphonate polycondensate and stearic acid on the surface properties of calcium silicate hydrates, formed as a result of the hydration reaction between silica fume and calcium hydroxide, has been examined by the use of low-temperature nitrogen gas adsorption techniques. In addition, the interaction of such admixtures with the calcium silicate hydrates formed was investigated by infrared (IR) spectroscopic analysis. It was observed that both admixtures increased the specific surface area of the calcium silicate hydrates quite considerably relative to the behaviour of a blank sample (i.e. without addition of admixture), especially during the initial stages of hydration (after 24 h). IR examination demonstrated that the admixtures used did not interact chemically with the calcium silicate hydrates although physical interaction was possible.

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Studies of Surface Area and Pore Structure on Portland Cement Produced in Bajil and Amran, Yemen

Saleh

Al-Kadri

Babaqi

et al. 2008

SQU Journal for Science

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Portland cement pastes of various porosities were prepared using water/cement ratios of 0.30, 0.35, 0.40, 0.45, 0.50 and 0.55; and were hydrated for various time intervals ranging from 0.021 to 28 days. Pore structure and VL–t plots (plots of volume vs. thickness) of the hardened cement pastes were measured using nitrogen gas as the adsorbate. The results were found to be related to the mechanism of hydration as controlled by the pore system of the hardened pastes. Type ІІ adsorption isotherms of nitrogen were obtained for all hardened cement pastes. The adsorption-desorption isotherms indicated the existence of closed hysteresis loops for most of the investigated samples and in some other cases, these isotherms were fully reversible.

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Autoclaved slag-clinker-sand pastes surface area, pore structure and compressive strength

Cited by 3 publications

References 10 publications

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

Effect of Some Admixtures on the Surface Properties of the Hydration Products of Silica Fume/Ca(OH)₂ Mixtures

Studies of Surface Area and Pore Structure on Portland Cement Produced in Bajil and Amran, Yemen

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Autoclaved slag-clinker-sand pastes surface area, pore structure and compressive strength

Cited by 3 publications

References 10 publications

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

Mechanical and Micro-Structural Characteristics of Polymerimpregnated Cement Mortar Composites

Effect of Some Admixtures on the Surface Properties of the Hydration Products of Silica Fume/Ca(OH)2 Mixtures

Studies of Surface Area and Pore Structure on Portland Cement Produced in Bajil and Amran, Yemen

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Effect of Some Admixtures on the Surface Properties of the Hydration Products of Silica Fume/Ca(OH)₂ Mixtures