Effect of Thermal-cured Hydraulic Cement Admixtures on the Mechanical Properties of Concrete

Aljerf, Loai

doi:10.1007/bf03401142

Cited by 49 publications

(18 citation statements)

References 36 publications

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“…Besides the concerns regarding waste management, the cement industry can also present a threat to the environment (Aljerf, 2015). Cement production is responsible for some 5%-7% of CO 2 emissions worldwide (McLellan et al, 2011) and it is estimated to consume 2% of global primary energy (Chen, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…This reaction generates free silica tetrahedral and aluminium cations coordinated with oxygen, which will form a 3D structure (Duxson et al, 2007;Singh et al, 2015). The final AACs properties depend on the precursor, the relation between the proportions of SiO 2 and Al 2 O 3 , the CaO content, the alkali activator used, and the curing temperature (Aljerf, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Municipal solid waste incineration bottom ash as alkali-activated cement precursor depending on particle size

Maldonado-Alameda

Giró-Paloma

Svobodova-Sedlackova

et al. 2020

Journal of Cleaner Production

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Municipal solid waste incineration bottom ash as alkali-activated cement precursor depending on particle size

Maldonado-Alameda

Giró-Paloma

Svobodova-Sedlackova

et al. 2020

Journal of Cleaner Production

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“…Zinc phosphate cement was chosen, as it is widely researched, used and has favourable properties [13, 45, 46, 47, 48, 49]. Chan et al.…”

Section: Discussionmentioning

confidence: 99%

An auxiliary factor for increasing the retention of short abutments

AlShaarani

Alaisami

Aljerf

et al. 2019

Heliyon

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BackgroundRetention is an essential factor in the sustainability of the prosthesis, especially for short abutment. Despite, the availability of several auxiliary applications, achieving a clinically good retention for cast crowns in prepared short teeth remains a major challenge for the practicing dentist.ObjectivesThis study tests a new method for applying frustum-shaped grooves on short prepared abutments and compares them with traditional setting grooves.MethodsForty-eight copper machine-milled short dies with 3.5 mm length and 12o conversion with a chamfer finish line of 0.7 mm were prepared to mimic short prepared molars and distributed into 4 groups. A control group with two opposing setting grooves and two groups with dual opposing frustums, one of which was prepared to receive two integrated metal protrusions inside the casting that fit the frustums. Frustums were prepared with Komet bur No. 807 with dimensions 0.9 mm at the base and 0.7 mm at the occlusal surface. A direct wax-up was carried out on all dies and all castings were cemented with zinc phosphate cement. A pull-off test was applied until separation. Data were analysed to compare the correlation of the four groups using one-way ANOVA and Bonferroni test (p ≤ 0.05).ResultsThe mean retentive values in Newton were as follows: the control group, 457.80; the setting grooves group, 461.07; the frustum group, 597.59; and the frustum group with the two metal protrusions, 919.80. The retention was increased by 65% in frustum group and doubled in frustum group with the metal protrusions.ConclusionsThe results showed a statistical significance in retention in the frustum groups with and without metal protrusion over the retention of the control and the setting grooves groups.

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“…Cement is essential ingredients that can fulfil the basic requirement in our day to day life [1] Cement requirements include the construction of housing and infrastructure crucial to mankind and play an essential role in the global construction industries [2]. The cement production is accompanied by the higher consumption of energy (thermal and electricity), calls for the need for large quantities of resources and thus, causes significant impact on the environment [3]. About 11% of total energy consumption in the industries is accounted only for the cement industry [4].…”

Section: Introductionmentioning

confidence: 99%

Thermal energy consumption and its conservation for a cement production unit

Verma

Mazumdar

Ghosh

2020

Environmental Engineering Research

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The manufacturing of cement is an energy-intensive industrial process which requires huge amount of heat to be supplied at a higher value of temperature. In this paper, use of the thermal energy at different sections of clinker manufacturing in cement industry, losses and thermal energy savings have been reviewed and presented. A detailed analysis of pre heater, kiln & clinker cooler was done and possible approaches of heat recovery from major losses have been discussed for technological opportunities to maximize use of waste heat recovery. The amount of CO2 emission reduction has been presented along with the payback period for energy saving measures. The energy efficiency during clinker formation was 58.67%. Unidentified losses of 5.74% were observed for the system. The energy of 16.34% was conserved by using the waste heat recovery system for electricity generation and 1.15% was conserved by using the pyro jet burner and gunning castable of 250 mm as per our design data for the cement production unit. Overall, 75.17% of heat was utilized during the process and 24.83% was lost through stack and other activities.

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Effect of Thermal-cured Hydraulic Cement Admixtures on the Mechanical Properties of Concrete

Cited by 49 publications

References 36 publications

Municipal solid waste incineration bottom ash as alkali-activated cement precursor depending on particle size

Municipal solid waste incineration bottom ash as alkali-activated cement precursor depending on particle size

An auxiliary factor for increasing the retention of short abutments

Thermal energy consumption and its conservation for a cement production unit

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