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Sanghee Kim, Donghyuk Jung, Ju-Yong Kim and Ju-Hyun Mun
Although accurately estimating the early age compressive strength of concrete is essential for the timely removal of formwork and the advancement of construction processes, it is challenging to estimate it in cool, cold, hot, or unmanaged conditions. Var...
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Seungwook Lim and Sungchul Yang
This paper describes the development of the constitutive model for early-aging viscoelastic concrete. And this paper provides the work related to material testing and modeling for identifying the required constitutive properties of early-age concrete.
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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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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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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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Sungwon Kim, Hyemin Hong, Taek Hee Han and Min Ook Kim
In this study, coating equipment for the effective underwater repair of submerged structures was developed. The tensile bond characteristics of selected epoxy resin coatings were investigated by coating the surface of a specimen using each of the four ty...
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Jacky Mazars, Stéphane Grange and Matthieu Briffaut
The objective of this work is to propose a comprehensive and efficient modeling approach to simulate the entire loading program of the RG8 test (both the restrained shrinkage and mechanical parts) performed within the framework of the French national pro...
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Doddy Prayogo
Pág. 21 - 29
Estimating the accurate concrete strength has become a critical issue in civil engineering. The 28-day concrete cylinder test results depict the concrete's characteristic strength which was prepared and cast as part of the concrete work on the project....
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Samuel Olufemi Folagbade
Pág. 14 - 20
Heat of hydration up to 72 hours and compressive strength up to 7 days of Portland cement and 17 binary and ternary cements containing fly ash, silica fume, and metakaolin, at a water/cement ratio of 0.50 and addition contents of 20%, 35%, and 55%, were ...
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Shuaicheng Guo, Qingli Dai, Xiao Sun, Ye Sun and Zhen Liu
Entrained air voids can improve the freeze-thaw durability of concrete, and also affect its mechanical and transport properties. Therefore, it is important to measure the air void structure and understand its influence on concrete performance for quality...
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Pawel Lisowski and Michal A. Glinicki
The wide use of multi-component cement of highly reduced Portland clinker factor is largely impeded by detrimental changes in the rheological properties of concrete mixes, a substantial reduction in the early rate of cement hardening, and sometimes the i...
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Nara Cangussu, Ana Mafalda Matos, Paula Milheiro-Oliveira and Lino Maia
The mixture design of cement-based materials can be complex due to the increasing number of constituent raw materials and multiple requirements in terms of engineering performance and economic and environmental efficiency. Designing experiments based on ...
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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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Wawa Wartini
Pág. 74 - 80
Language is a very important tool in the child's life, because with the language of children can communicate with others, the language aspect developed is reading in early childhood. Early reading can be said of the early ability to pass the child in the...
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Eneng YuliIwan Ruswandy
Pág. 135 - 142
Teaching children to recognize letters is not an easy thing to do, not a few parents and early childhood educators need more patience to introduce letters, introducing letters to children is difficult enough especially to teach them reading. Children are...
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deepprilla suhanda
Pág. 73 - 80
Golden age is the golden age of child development which at the age of 0-6 years improves child interpersonal intelligence has been achieved at this time one of them through the implementation of the project method. The goal to be achieved through this re...
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S. V. Borshchevskyi
Pág. 102 - 106
The combined technological chart for building of vertical shafts is analysed. The influence of strength properties of hardening concrete on interactions of the system «timber ? massif» is explored by means of numerical simulation. The recommendations on ...
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Bernard A. Zulu, Shingo Miyazawa and Nobukazu Nito
Accelerated curing is used for mass production in the precast concrete industry. Autogenous shrinkage and drying shrinkage occur in concrete, during and after accelerated curing. Thus, thermal cracks may occur in concrete due to both heating and cement h...
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Dwi Hayantina Sunarni
Pág. 319 - 327
Having children who has a good character is every parent wish. For having this good character its need to be done from early age. All the parents has an important role on building this character to their children. Children as a good imitators will do wha...
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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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