Calcium carbide residue as auxiliary activator for one-part sodium carbonate-activated slag cements: compressive strength, phase assemblage and environmental benefits

2021 ◽  
Vol 308 ◽  
pp. 125015
Author(s):  
Xuan Gao ◽  
Xiao Yao ◽  
Tao Yang ◽  
Shiming Zhou ◽  
Haoguang Wei ◽  
...  
2019 ◽  
Vol 8 (5) ◽  
pp. 4757-4765 ◽  
Author(s):  
Saofee Dueramae ◽  
Weerachart Tangchirapat ◽  
Piti Sukontasukkul ◽  
Prinya Chindaprasirt ◽  
Chai Jaturapitakkul

Author(s):  
Adeyemi Adesina ◽  
Jonathan Cercel ◽  
Sreekanta Das

This study presents the experimental investigation of the effect of curing media on the properties of mortar mixtures made with sodium carbonate activated slag-glass powder as a binder. Slag and glass powder were used at an equal percentage as the aluminosilicate precursor and the binary blend was activated with sodium carbonate. The compressive strength and ultrasonic pulse velocity of the mixtures cured in different conditions were investigated. The curing conditions used in this study are dry, moist, and submerged curing. Microstructural investigations were also carried out to understand the microstructural properties of the mixtures exposed to these curing conditions. Results from this study showed that moist curing is the most effective curing method for mortar made with sodium carbonate alkali-activated slag-glass powder as a binder. Microstructural evaluations further confirm the strength results as mortar samples cured in a moist condition exhibited a denser microstructure.


MRS Advances ◽  
2018 ◽  
Vol 3 (34-35) ◽  
pp. 2009-2014 ◽  
Author(s):  
Philbert Nshimiyimana ◽  
David Miraucourt ◽  
Adamah Messan ◽  
Luc Courard

ABSTRACTEarth stabilization, using two by-products available in Burkina Faso: Calcium Carbide Residue (CCR) and Rice Husk Ash (RHA), improved the performance of compressed earth blocks (CEBs). The effect of adding CCR or CCR: RHA (in various ratios) to the clayey earth was investigated. CEBs were molded by manually compressing moisturized mixtures of earthen materials and 0-15 % CCR or CCR: RHA (various ratios) with respect to the weight of earthen material. The results showed that, with 15 % CCR: RHA in 7: 3 ratio, the compressive strength of CEBs (6.6 MPa) is three times that of the CEBs containing 15 % CCR alone (2.2 MPa). This improvement was related to the pozzolanic reaction between CCR, clay and RHA. These CEBs comply with the requirement for wall construction of two-storey housing.


2017 ◽  
Vol 147 ◽  
pp. 713-719 ◽  
Author(s):  
Charin Namarak ◽  
Patompong Satching ◽  
Weerachart Tangchirapat ◽  
Chai Jaturapitakkul

2020 ◽  
Vol 29 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Adeyemi Adesina

AbstractThe use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties. However, the lower early age performance of composites made with such binder has limited its use especially in applications where higher early age is required. Hence, in order to propel the application of this sustainable binder, it is imperative to find ways in which the early age performance can be enhanced without having a detrimental effect on later age performance. One of the effective and sustainable ways to enhance the early age strength of sodium carbonate activated slag is by incorporation of various additives as partial replacement of sodium carbonate on/and slag. In order to propel more application of sodium carbonate slag for various applications, this current study was undertaken. In this paper, an overview of the types of various additives that can be used to enhance the early age compressive strength of sodium carbonate activated slag composites was discussed. The mechanism and dosage of each of the additives were briefly discussed alongside the limitation and advantages of the additives. Findings from this overview showed that the early age compressive strength of sodium carbonate activated slag can be enhanced with the use of additives such as calcium oxide, calcium hydroxide, Portland cement, sodium hydroxide and sodium silicate.


2020 ◽  
Vol 5 (2) ◽  
pp. 121-130
Author(s):  
Cut Rahmawati ◽  
Meliyana Meliyana ◽  
Ibnu Thufaila ◽  
Muhtadin Muhtadin ◽  
Muhammad Faisal

Calcium carbide residue is an unutilized by-product. It contains high calcium and can be used to produce cementitious. The variation of Calcium carbide residue used is 0%, 5%, and 15%. This study focused on the reduction of the cement used and lightweight bricks resistance toward the fire condition. Moreover, the tests were carried out by examining the compressive strength before and after lightweight bricks burned, X-ray fluorescence (XRF), Scanning Electron Microscope (SEM), and Fourier-Transform Infrared Spectroscopy (FTIR). The result showed a decrease of compressive strength on 10% and 15% carbide variation. At the combustion temperature of 250 °C, micro-cracking occurred at 0% and 5% carbide specimens, while not only cracking but also spalling and crazing were at the specimens with 10% carbide. The 5% variation of calcium carbide residue can increase the compressive strength and endurance at 250 °C. At the higher temperature, the compressive strength was decreased, and the material was damaged. IR-spectroscopy test results showed that 5% carbide composition achieved the highest compressive strength because the amount of H2O2 used reacts with CaO.


2014 ◽  
Vol 26 (4) ◽  
pp. 633-643 ◽  
Author(s):  
Apichit Kampala ◽  
Suksun Horpibulsuk ◽  
Nutthachai Prongmanee ◽  
Avirut Chinkulkijniwat

2020 ◽  
Vol 42 (2) ◽  
pp. 141-151
Author(s):  
Nguyen Anh Duong ◽  
Phan Luu Anh ◽  
Tran Thi Man ◽  
Tran Thi Lan

In Vietnam, calcium carbide residue (CCR) from the acetylene gas factories are not properly treated, causing serious environmental pollution. Based on mineral composition determined by XRD, calcium carbide residue consisted mainly of portlandite (70-72%), calcite (14-16%), hydrocalumite (6-8%), and chemical composition determined by XRF method composed of CaO (53.02%), LOI (39.72%). This calcium carbide residue can be used as a source of hydrated lime, mixed with fly ash, sand, and cement to produce non-calcined bricks and test results show that brick specimens achieved compressive strength 3.0-7.5 MPa, water absorption 12.3-17.5%, density 1.28-1.80kg/cm3. The test bricks satisfied Vietnamese standards for construction bricks.


2021 ◽  
Vol 904 ◽  
pp. 435-440
Author(s):  
Thunthanut Inyai ◽  
Phongthorn Julphunthong ◽  
Panuwat Joyklad

The present study evaluated the engineering properties and microstructure of an alternative binder composed of calcium carbide residue and silica fume. The cementitious mechanisms of this alternative binder based on the pozzolanic reaction in raw materials. The ratio of calcium carbide residue and silica fume was decided based on the chemical composition of raw materials and their chemical reaction. The calcium carbide residue-silica fume mortar was prepared and tested for its compressive strength at several curing periods, with results then compared to conventional mortar made with ordinary Portland cement. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to investigate the microstructure of hardened mortars. The test results suggest that the compressive strength of calcium carbide residue-silica fume mortar continuously developed throughout the curing period. The relative compressive strength of calcium carbide residue-silica fume mortar reached 72.78% of the ordinary Portland cement mortar strength at 28 days curing age.


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