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Qiuchao Li, Yingfang Fan, Yulong Zhao and Zilong Liang
The early-age properties of nano-metakaolin (NMK) cement paste were examined from 15 min to 24 h, contacted between cement and water based on the electrochemical impedance spectroscopy (EIS) method. The effects of a superplasticizer and chloride ions wer...
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Masumi Inoue, Heesup Choi, Yuhji Sudoh, Koichi Ayuta
Pág. 22 - 24
This study aimed to clarify the leaching properties of nitrite ions in nitrite-type repair materials exposed to rainfall. Repaired concrete specimens were prepared for leaching tests using a lithium nitrite solution, and the amounts of leaching and penet...
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Daniel Suarez-Riera, Luca Lavagna, Juan Felipe Carvajal, Jean-Marc Tulliani, Devid Falliano and Luciana Restuccia
Biochar, the solid sub-product of biomass pyrolysis, is widely considered an effective water retention material thanks to its porous microstructure and high specific surface area. This study investigates the possibility of improving both mechanical and r...
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Nevena ?ivanovic, Marina A?krabic, Aleksandar Savic, Mi?a Stevic and Zoran Stevic
Infrared thermography is an advanced technique usually applied for the assessment of thermal losses through different elements of the building envelope, or as a method for detection of damage (cracks) in reinforced concrete elements, such as bridges. Use...
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Svetlana V. Samchenko, Irina V. Kozlova and Andrey V. Korshunov
The reliability of concrete structures is closely related to the durability of the concrete materials stable under external environmental conditions. The present study is aimed at analysing the effect of a prospective hardening additive containing calciu...
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Linchun Zhang, Ailian Zhang, Ke Li, Qian Wang, Junzhe Liu and Hui Wang
The electrical resistance and polarization effect of cement paste containing reinforcement were tested to research the anti-corrosion properties of steel bars in cement paste. Moreover, the microstructure and composition of passivation film and rust on t...
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Miguel Ángel Sanjuán, Esteban Estévez and Cristina Argiz
The testing procedure provided in this paper aims to estimate the available alkali content in cement-based materials, and it has a direct application in the construction materials field. Particularly, it should be used when the potential alkali?silica re...
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Dan Jin, Zejun Lang and Wu Yao
The change of the evaporable water content in the early hydration process of cement paste with different water-to-cement ratios was monitored by low field nuclear magnetic resonance (LF-NMR) relaxometry. The hydration degree and gel/space ratio were acco...
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Miguel-Ángel Climent, Jesús Carmona and Pedro Garcés
This paper reviews research carried out towards the development of a novel conductive coating for reinforced concrete structures in order to enable the application of electrochemical anti-corrosion treatments. The coating is composed of a hardened paste ...
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Akaninyene A Umoh,Isaac Abiodun Odesola
Pág. 22 - 28
The use of bamboo leaf ash as cement supplement can contribute to reduction in cost and environmental hazard associated with cement production as well as waste pollution caused by the littered bamboo leaves. Therefore, the characteristics of cement paste...
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Jherson Eveiro Díaz, Ruby Mejía de Gutierrez, Janneth Torres
Pág. Page 141 - 154
The effect of the incorporation of a petrochemical industry waste, named spent fluid catalytic cracking (FCC) in the hydration process and microstructure of cementpaste, was studied. Portland cement (OPC) pastes, with and without addition of meta-kaolin ...
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Thi Xuan Hoa Chu, Jinhai Zheng, Da Chen, Thi Thu Huong Nguyen, Elsafi Elbashiry and Van Tai Tang
This novel study on cement paste material was conducted with the aim of keeping up with the rapid development of urban construction and contributing to the continuous improvement of building materials to overcome environmental issues. In this study, seve...
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Junhao Ye, Songhui Liu, Jingrui Fang, Haibo Zhang, Jianping Zhu and Xuemao Guan
This study focused on the synthesis of aragonite whiskers through a synergistic wet carbonation technology utilizing waste magnesia slag (MS) and magnesium sulfate (MgSO4), aiming to improve the microstructure and mechanical properties of ordinary Portla...
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Xianzheng Yu, Hua Liu, Xiaolin Fan, Liangyu Zhu, Chengqi Zhang and Shiyi Zhang
In marine environments, bridge piers and columns are prone to corrosion caused by harmful media, particularly chloride ions. This corrosion can lead to cracking of the steel bars in the protective layer of the bridge piers. To enhance the corrosion resis...
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Vinh Thi Hai Chu, Vinh Duc Bui and Tue Viet Nguyen
Ultra-High Performance Concrete (UHPC) improves the bearing capacity as well as the durability of structural concrete. This study aims to investigate the constituents of UHPC in both phases: aggregate and cementitious materials. The proper ratio of the m...
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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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Baoliang Li, Zhouyang Tang, Binbin Huo, Zejun Liu, Yongzhen Cheng, Baizhan Ding and Peng Zhang
The hydration products and strength of cement pastes incorporated with ground blast furnace slag (GBFS) (0% and 20% replacement) have been investigated under steam curing condition (80 °C for 7 h and 7 d) in comparison with normal curing condition (moist...
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Petros Petrounias, Panagiota P. Giannakopoulou, Aikaterini Rogkala, Panagiotis M. Stamatis, Basilios Tsikouras, Dimitrios Papoulis, Paraskevi Lampropoulou and Konstantin Hatzipanagiotou
This study aims at the interpretation of the adverse effects of the secondary products in two types of rocks during their performance as concrete aggregates. Serpentinised peridotites contain serpentine, as the dominant secondary phase, which creates low...
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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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Fouad Ismail Ismail, Syed Ahmad Farhan, Nasir Shafiq, Nadzhratul Husna, Muhammad Taufiq Sharif, Syed Uthman Affan and Arul Kamal Veerasenan
Silica aerogel possesses an ultra-low thermal conductivity by virtue of its nano-structure. Owing to the fragility of monolithic aerogel, the development and production of aerogel-based insulation materials involve the incorporation of granular aerogel w...
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