Behavior of composite cement pastes containing silica nano-particles at elevated temperature

Heikal, Mohamed; Ali, Azmat; Ismail, M. N.; Ibrahim, Sara

doi:10.1016/j.conbuildmat.2014.07.078

Cited by 95 publications

(48 citation statements)

References 48 publications

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“…The flask is closed with air reflux and shaken on a water bath at 60-70°C for 1 h. The sample is filtered through filter paper then washed three times with 15 mL ethylene glycol. The filtrate is titrated with standardized 0.1 N aqueous HCl by using phenolphthalein as indicator till the pink color disappeared (end point) [25].…”

Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Physico-mechanical, microstructure characteristics and fire resistance of cement pastes containing Al 2 O 3 nano-particles

Heikal

Ismail

Ibrahim

2015

Construction and Building Materials

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113

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Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Physico-mechanical, microstructure characteristics and fire resistance of cement pastes containing Al 2 O 3 nano-particles

Heikal

Ismail

Ibrahim

2015

Construction and Building Materials

Self Cite

113

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“…In addition to the SCMs in concrete studies discussed above against fire, the fire resistance of high strength FA mortars with NS [43] and slag with NS [44]. Using colloidal NS (up to 7.5 % cement replacement) along with high-volume FA (up to 45 %), replaced cement mortars showed equivalent residual strength after exposure to 700°C compared to control cement mortars before exposure to high temperature, whereas slag with 30-60 % replacement of cement in the presence of 4 % mass NS has showed a higher resistance to fire up to 1000°C than all the other composite cement pastes.…”

Section: Introductionmentioning

confidence: 98%

Effect of high temperature on the properties of ternary blended cement pastes and mortars

Maheswaran

Iyer

Palani

et al. 2015

J Therm Anal Calorim

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This paper presents experimental study to investigate the effect of high temperature up to 800°C on the properties of ternary blended Portland cement, lime sludge (LS), a residual solid from paper and pulp industry, with silica fume (SF) and nanosilica (NS). Physicochemical properties and mechanical behavior of ternary blended cement are studied. The replacement of cement by LS is fixed throughout as 20 % except control paste/mortar. In addition to the replacement of LS, SF by 3 and 6 % and NS by 1.5 and 3 % are incorporated in cement paste and mortar. The phase changes due to the thermal effect of all the 28-day water-cured composite pastes are monitored by XRD and thermal analysis by TG-DTG. Unstressed residual compressive strength tests are used in this study for the mortars. Results show that the incorporation of LS-SF cement composites with cement replacement level up to 26 % increases the compressive strength significantly at ambient temperature as well as after 2-h exposure to 500°C compared to control mortars, but spalling of mortars occurs at 800°C after 28 days of water curing. In the case of LS-NS cement composites, the residual compressive strength reduces considerably at all the temperatures, but there is no occurrence of spalling.

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“…The resistance of concrete exposure to elevated temperatures depends on the type of material used in the concrete. Both chemical and physical deteriorations occur at elevated temperatures because both interlayer and chemically bound water are lost due to the decomposition of calcium hydroxide (CH) and calcium silicate hydrate (C-S-H) as well as other hydration products [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of substitution of blast-furnace slag by fired drinking water sludge on the properties of pozzolanic cement pastes

El-Didamony

Mohammed

Osman

2015

J Therm Anal Calorim

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The effect of fired drinking water sludge (FDWS) as a mineral admixture on the physico-mechanical properties and the fire resistance of pozzolanic cement pastes has been investigated. Five blends of ordinary Portland cement, blastfurnace slag (GBFS) and FDWS were prepared. The Portland cement was fixed to 70 mass%, while granulated slag was replaced by 0, 3, 6, 9 and 12 mass% of fired sludge. The phase composition was identified using X-ray diffraction, thermal gravimetric analysis and differential scanning calorimetry. The results have shown an increase in the required water of standard consistency and elongation of setting times with increasing the fired sludge content. The bulk density has decreased with increasing the sludge content, while the compressive strength was enhanced at later ages for 3 and 6 mass% FDWS substitution. In addition, the specimen that contains 9 mass% FDWS gave the best firing resistance at high temperature, whereas Portland cement paste has been completely deteriorated at 800°C.

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Behavior of composite cement pastes containing silica nano-particles at elevated temperature

Cited by 95 publications

References 48 publications

Physico-mechanical, microstructure characteristics and fire resistance of cement pastes containing Al 2 O 3 nano-particles

Physico-mechanical, microstructure characteristics and fire resistance of cement pastes containing Al 2 O 3 nano-particles

Effect of high temperature on the properties of ternary blended cement pastes and mortars

Effect of substitution of blast-furnace slag by fired drinking water sludge on the properties of pozzolanic cement pastes

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