Searched for: subject:"Concrete"
(1 - 20 of 434)

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Liu, Faqi (author), Yang, Hua (author), Yan, R. (author), Wang, Wei (author)
The behaviour of square steel tube confined reinforced concrete columns after fire exposure was studied experimentally and numerically in this paper. Eighteen stub columns were first heated following the ISO 834 standard fire including both heating and cooling phases, and were subsequently loaded to failure after cooling to ambient temperature....
journal article 2019
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Lu, T. (author)
Concrete is a brittle composite material that easily fractures under tension. Due to the fact that the early-age deformation of the concrete member is restrained by adjoining structures, cracking can occur throughout the concrete prior to application of any load. The cracks would provide preferential access for aggressive agents penetrating in...
doctoral thesis 2019
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Yu, C. (author)
It is difficult to accurately predict the strength of masonry and concrete structures. The most widely used method for simulating their behaviour is finite element analysis with the Newton-Raphson method and arch length control. However, the Newton-Raphson method can diverge and not produce a result, for example in bifurcations or during snap...
doctoral thesis 2019
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Chen, Y. (author), Li, Z. (author), Chaves Figueiredo, S. (author), Copuroglu, O. (author), Veer, F.A. (author), Schlangen, H.E.J.G. (author)
The goal of this study is to investigate the effects of different grades of calcined clay on the extrudability and early-age strength development under ambient conditions. Four mix designs were proposed. Three of them contained high, medium, and low grades of calcined clay, respectively, and one was the reference without calcined clay. In terms...
journal article 2019
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Chen, Y. (author), Chaves Figueiredo, S. (author), Yalçinkaya, Ç. (author), Copuroglu, O. (author), Veer, F.A. (author), Schlangen, H.E.J.G. (author)
To investigate the effects of viscosity-modifying admixture (VMA) on the extrudability of limestone and calcined clay-based cementitious materials, three mix designs with different dosages of VMA were proposed in this study. The ram extrusion was utilized as an extrusion model for exploring the fresh properties of printable materials. Two...
journal article 2019
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Angst, Ueli M. (author), Geiker, Mette R. (author), Alonso, Maria Cruz (author), Polder, R.B. (author), Elsener, Bernhard (author), Wong, Hong (author), Michel, Alexander (author), Hornbostel, Karla (author), Sanchez, Mercedes (author)
The steel–concrete interface (SCI) is known to influence corrosion of steel in concrete. However, due to the numerous factors affecting the SCI—including steel properties, concrete properties, execution, and exposure conditions—it remains unclear which factors have the most dominant impact on the susceptibility of reinforced concrete to...
review 2019
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Panda, Biranchi (author), Noor Mohamed, Nisar Ahamed (author), Chandra Paul, Suvash (author), Bhagath Singh, GVP (author), Tan, Ming Jen (author), Šavija, B. (author)
The advent of digital concrete fabrication calls for advancing our understanding of the interaction of 3D printing with material rheology and print parameters, in addition to developing new measurement and control techniques. Thixotropy is the main challenge associated with printable material, which offers high yield strength and low viscosity....
journal article 2019
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Xu, Y. (author), Schlangen, H.E.J.G. (author), Šavija, B. (author)
Strain hardening cementitious composites are a class of cementitious materials showing metal-like (i.e. pseudo-plastic) behavior in tension due to their multiple cracking ability. This is commonly achieved through use of fiber reinforcement (such as PVA) or, similarly, textile reinforcement (TRC). Increasing the ductility is important in...
conference paper 2019
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Yao, Yue (author), Hu, Mingming (author), Di Maio, F. (author), Cucurachi, Stefano (author)
Three-dimensional (3D) printing and geo-polymers are two environmentally oriented innovations in concrete manufacturing. The 3D printing of concrete components aims to reduce raw material consumption and waste generation. Geo-polymer is being developed to replace ordinary Portland cement and reduce the carbon footprint of the binder in the...
journal article 2019
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Mendoza-Lugo, Miguel Angel (author), Delgado-Hernández, David-Joaquín (author), Morales Napoles, O. (author)
In the bridge industry, current traffic trends have increased the likelihood of having the simultaneous presence of both extreme live loads and earthquake events. To date, their concurrent interaction has scarcely been systematically studied. Prevailing studies have investigated the isolated existence of either live loads or seismic actions. In...
journal article 2019
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Abambres, Miguel (author), Lantsoght, E.O.L. (author)
Comparing experimental results of the shear capacity of steel fiber-reinforced concrete (SFRC) beams without stirrups to the capacity predicted using current design equations and other available formulations shows that predicting the shear capacity of SFRC beams without mild steel shear reinforcement is still difficult. The reason for this...
journal article 2019
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Vanhecke, Jeremy (author), Devroey, X.D.M. (author), Perrouin, Gilles (author)
Test definition and execution is an essential but time-consuming task during system development. To speed up the process, model-based testing and other related approaches propose to generate/write abstract test cases and to concretize them using either transformations, an adapter, or a mixture of the two. QTaste is an industrial data-driven test...
conference paper 2019
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De Boer, Ane (author), Hendriks, M.A.N. (author), Lantsoght, E.O.L. (author)
The Dutch Ministry of Infrastructure and the Environment is concerned with the safety of existing infrastructure and expected re-analysis of a large number of bridges and viaducts. Nonlinear finite element analysis can provide a tool to assess safety; a more realistic estimation of the existing safety can be obtained. <br/>Dutch Guidelines,...
conference paper 2019
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Lukovic, M. (author), Ye, G. (author), Schlangen, H.E.J.G. (author), van Breugel, K. (author)
Infrastructure is ageing and we are facing a serious challenge on how to deal with it. One possible solution is to repair it, but the life of current concrete repairs, including all types of repairs and application of different materials, is not satisfactory and there is an urgent need for improvement. Understanding the damage development in a...
conference paper 2019
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Lukovic, M. (author), Hordijk, D.A. (author), Huang, Z. (author), Schlangen, H.E.J.G. (author)
Strain Hardening Cementitious Composite (SHCC) is an innovative material which, due to the special material composition and the addition of fibres, exhibits a controlled microcracking behaviour under tensile stresses. As such it might be a promising material for improvement of durability of concrete structures.<br/><br/>An experimental study was...
journal article 2019
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Dong, H. (author), Ye, G. (author)
Chloride-induced corrosion is a critical issue for RC structures. Cement-based coatings can be used to protect concrete structures with unsatisfactory quality against chloride ingress. To evaluate the effectiveness of the coatings to extend the service life of coated concrete structures, the evolution of the chloride profile in the coated...
journal article 2019
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Zhang, Youyou (author), Liu, Yuqing (author), Xin, H. (author), He, Jun (author)
Steel-concrete composite high bridge pier has been applied increasingly in China and around the world. Most applied steel type in the composite piers are H-shaped steel and steel pipe, while seldom research or practice is associated with angle steel. This paper conducted parametric study on the composite column with equal-leg angle steel and...
journal article 2019
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Provis, John L. (author), Arbi, Kamel (author), Bernal, Susan A. (author), Bondar, Dali (author), Buchwald, Anja (author), Castel, Arnaud (author), Chithiraputhiran, Sundararaman (author), Ye, G. (author), Zuo, Y. (author)
The aim of RILEM TC 247-DTA ‘Durability Testing of Alkali-Activated Materials’ is to identify and validate methodologies for testing the durability of alkali-activated concretes. To underpin the durability testing work of this committee, five alkali-activated concrete mixes were developed based on blast furnace slag, fly ash, and flash-calcined...
journal article 2019
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Li, Z. (author), Liu, Jiahua (author), Ye, G. (author)
This study investigates the drying shrinkage and the shrinkage-induced stress of alkali-activated blast furnace slag and fly ash concrete (AC) in comparison with ordinary Portland cement concrete (OC). For samples that were dried from 1 day after casting, the drying shrinkage of AC was much higher than that of OC. For samples that were stored...
journal article 2019
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Agar Ozbek, Ayda Safak (author), Weerheijm, J. (author), van Breugel, K. (author)
In this work, findings of a numerical study performed to investigate the impact behavior of porous concrete, modeled as a four phase cementitious composite consisting of aggregates, cement paste, interfacial transition zones (ITZ) and air, are presented. The numerical analyses contributed to the process of designing a special type of concrete...
journal article 2019
Searched for: subject:"Concrete"
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