Experimental study on PPP-BOTDA-based monitoring approach of concrete structure crack

2021 ◽  
Vol 65 ◽  
pp. 102590
Author(s):  
Huaizhi Su ◽  
Zhiping Wen ◽  
Pengpeng Li
Keyword(s):  
Experimental Study ◽  
Concrete Structure ◽  
Structure Crack

Experimental Study on the Impact of Admixture for Concrete Heat of Hydration and Early-Age Contractile Properties

2012 ◽  
Vol 253-255 ◽  
pp. 385-389 ◽  
Author(s):  
Jian Cheng Sun ◽  
Bo Jun Wang ◽  
Wen Zhong Zhao
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Concrete Structure ◽  
Autogenous Shrinkage ◽  
Heat Of Hydration ◽  
Reducing Agent ◽  
Hydration Heat ◽  
Early Age ◽  
Mix Proportion ◽  
Structure Crack

During the technology development of modem concrete, concrete structure crack (especially early-age crack) becomes more and more serious and has been one of main research directions of civil engineering. This paper aims at the seriousness of concrete structure crack and presents one of main cause is that concrete early-age (especially autogenous shrinkage) become large through the experimental study. autogenous shrinkage are mainly belongs to temperature cracks and desiccation cracks. Analyses the affection of ash and water reducing agent on the hydration heat, under the optimum proportion experiment which aims at reducing he hydration heat of cement. The best program are obtained that double mix with 20% fly ash and 1.5% water reducing agent .Design mortar’s early anti-crack experiment, and study crack-resistance and other mechanical properties based on different ages & different mix proportion. From the experiment, analyses early cracking under the influence of admixtures. The mix proportion of 20% fly ash, 10% slag and 1.2% water reducing agent can minimize the creation of cracks.

scholarly journals EXPERIMENTAL STUDY ON THE CRUSHING EFFICIENCY OF A CONCRETE STRUCTURE DUE TO AN EDGE EXCAVATION SYSTEM

2005 ◽  
pp. 25-33
Author(s):  
Tatsuro MURO ◽  
Youichi SAKUHARA ◽  
Kazuhiro FUJIWARA ◽  
Koichi KOHNO
Keyword(s):  
Experimental Study ◽  
Concrete Structure

Compressive Strength of Concrete from Lightweight Bubbles Aggregate

2015 ◽  
Vol 754-755 ◽  
pp. 348-353 ◽  
Author(s):  
Norlia Mohamad Ibrahim ◽  
Leong Qi Wen ◽  
Mustaqqim Abdul Rahim ◽  
Khairul Nizar Ismail ◽  
Roshazita Che Amat ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Compressive Strength ◽  
Natural Resources ◽  
Concrete Structure ◽  
Concrete Mixture ◽  
New Materials ◽  
Concrete Mixtures ◽  
Compressive Strength Of Concrete

Compressive strength of concrete is the major mechanical properties of concrete that need to be focused on. Poor compressive strength will lead to low susceptibility of concrete structure towards designated actions. Many researches have been conducted to enhance the compressive strength of concrete by incorporating new materials in the concrete mixture. The dependencies towards natural resources can be reduced. Therefore, this paper presents the results of an experimental study concerning the incorporation of artificial lightweight bubbles aggregate (LBA) into cementations mixture in order to produce comparable compressive strength but at a lower densities. Three concrete mixtures containing various percentages of LBA, (10% - 50% of LBA) and one mixture used normal aggregate (NA) were prepared and characterized. The compressive strength of LBA in concrete was identified to be ranged between 39 MPa and 54 MPa. Meanwhile, the densities vary between 2000 kg/m3 to 2300 kg/m3.

Discussion on Forming Reason of Concrete Cracks

2014 ◽  
Vol 1065-1069 ◽  
pp. 1875-1878
Author(s):  
Zhi Neng Tong
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Reinforced Concrete Structure ◽  
Normal Concrete ◽  
Crack Analysis ◽  
Structure Crack

Fracture is a kind of effect of common reinforced concrete structure, concrete structure crack is the most common in the industry, is difficult to avoid the phenomenon of cracks, heavy then endanger the safety of the structure, and the use of the normal concrete light will influence the housing life. This paper classifies the cracks from different angles, and the forming reason of crack analysis.

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