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Vyacheslav Troyan,Nadiia Sova
Pág. 13 - 19
The paper reports results of examining the influence of modifier admixtures on the corrosion resistance of concrete for reinforced concrete sleepers based on the criteria of electric resistance, resistance to alkaline corrosion and corrosion due to the c...
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Guangzheng Qi, Qiang Zhang and Zhengning Sun
Supersulfated cement (SSC), a low-carbon, energy-efficient, eco-friendly cementitious material, is mainly made from industrial byproducts. However, SSC?s slow early strength development leads to inadequate initial hardening and reduced durability, which ...
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Wentao Li, Runxiang Li, Yin Chen and Henglin Xiao
Sulfate-bearing soils, which causes many engineering problems, e.g., cracking, collapse, and pavement layer settlement, are often encountered in the construction of pavements. Ground granulated blast furnace slag (GGBS)-magnesia (MgO) has been regarded a...
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Chuanlin Wang, Zeping Liu, Tengteng Zhang, Yuxuan Zhang, Zehong Liu and Xianbo Zhao
This research investigates the effect of seawater of different concentrations on the hydration process and microstructure of calcium sulphoaluminate (CSA) cement. It studies the CSA cement pastes via experiments carried out to determine the initial and f...
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Khaled Ibrahim Azarroug Ehwailat, Mohd Ashraf Mohamad Ismail and Ali Muftah Abdussalam Ezreig
The treatment of sulfate-bearing soil with calcium-based stabilizers such as cement or lime often results in ettringite formation, consequently leading to swelling and strength deterioration. Ettringite formation has negative environmental and economic e...
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Yubin Jun, Jae Hong Kim and Taewan Kim
This study investigated the properties of hardened pastes made with calcium sulfoaluminate expansive agent (CSA), red mud, and silica fume. Five different ratios of 10:90, 20:80, 30:70, 40:60, and 50:50 were applied as the weight ratios of CSA and red mu...
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Fernando A. N. Silva, João M. P. Q. Delgado, António C. Azevedo, Tahlaiti Mahfoud, Abdelhafid Khelidj, Nicole Nascimento and António G. B. Lima
Early deterioration of reinforced concrete foundations has been often reported in recent years. This process is usually characterized by an extensive mapping cracking process on concrete surfaces that results from several types of Internal Swelling React...
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Franz-Georg Simon and Philipp Scholz
The long-term leaching behavior of incineration bottom ash (IBA) was studied with large-scale samples from two German waste incinerators with grate technology. The observation period was up to 281 days. The aging processes proceeded faster in the outdoor...
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Eyo Eyo and Samuel Abbey
This study investigated the consolidated undrained shear behaviour of a stabilised high-sulphate soil system. Lime was used to stabilise the soil with the inclusion of ground granulated blast furnace slag (GGBS) as an ettringite suppressor. Both volumetr...
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Taewan Kim, Ki-Young Seo, Choonghyun Kang and Tak-Kee Lee
This is an experimental study on the development of a low-carbon, eco-friendly cement containing a calcium sulfoaluminate expansive agent (CSAe), slag, and silica fume (SF). The cement to be developed has a low water/binder ratio (w/b) of 0.5 and is desi...
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Koichi Kobayashi and Wataru Koyanagi
This study was conducted on concrete using sewage sludge ash (SSA) with the aim to establish an efficient use of SSA as a cement replacement material. Concrete specimens with three degrees of strength were made from two different SSAs and exposed in temp...
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Diana M. Burgos, Luisa M. Cardona, Álvaro Guzmán, Khandaker M. Anwar Hossain, Silvio Delvasto
Pág. 447 - 456
AbstractThis article presents results of a research about the effect to incorporate Colombian volcanic materials as a replacement of ordinary Portland cement on its hydration process. For this particular case were used Tolima volcanic material (TVM) and ...
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Salain I.M.A.K.
Pág. 29 - 35
A study on reactivity of four different Circulating Fluidized Bed Combustion (CFBC) fly ashes has been realized in the presence of water. Paste of each ash was prepared and analyzed for its setting time, expansion and strength. The products of hydration,...
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Ruixin Jiang and Zhengjun Wang
The massive accumulation of graphite tailings causes serious environmental pollution, mainly from heavy metal pollution. Therefore, this article introduces a method of using graphite tailings as a high-content main material, cement as a small component o...
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Ankit Kothari, Thanyarat Buasiri and Andrzej Cwirzen
This study determined how replacing sodium nitrate-based antifreeze admixture (AF) with belite-calcium sulfoaluminate (belite-CSA) cement affects the early age properties of ecological concretes based on ordinary Portland cement (OPC) and ground granulat...
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Genbao Zhang, Zhiqing Ding, Runhong Zhang, Changfu Chen, Guihai Fu, Xiao Luo, Yufei Wang and Chao Zhang
Construction and demolition (C&D) waste has become a research hotspot due to the need for environmental sustainability and strength enhancement of cementitious materials. However, wider applications of C&D waste are limited, as its non-homogeneou...
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Ana Mafalda Matos
Nowadays, in Europe, several infrastructures, such as bridges, viaducts, and maritime structures, are in an advanced state of degradation. Therefore, novel repair/rehabilitation techniques are sought. Recent advances in ultra-high-performance fibre-reinf...
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Haibo Zhang, Xiaotian Zhang, Zhiying Guo and Hucheng Chai
Deep coal mining requires grouting to reinforce the coal rock walls. The conventional polymer-modified cement-based grouting materials have improved toughness but poor fluidity. The purpose of this paper was to improve the injectability of grout. The pre...
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Luqman Kolawole Abidoye and Diganta B. Das
This study elucidates the effects of the particle size, carbonation time, curing time and pressure on the efficiency of carbon storage in Portland cement mortar. Using pressure chamber experiments, our findings show how carbonation efficiency increases w...
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Chulseoung Baek, Junhyung Seo, Moonkwan Choi, Jinsang Cho, Jiwhan Ahn and Kyehong Cho
Circulating fluidized bed combustion (CFBC) power generation technology is known to efficiently reduce the emission of air pollutants, such as SO2 and NO2, from coal combustion. however, CFBC coal ash contains high contents of free CaO, making it difficu...
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