Discussion of Ceramsite Concrete Shaped Column in a Structural System

2012 ◽  
Vol 188 ◽  
pp. 205-210 ◽  
Author(s):  
Jun Guang Zhu ◽  
Xu Huang ◽  
Rong Yue Zheng
Keyword(s):  
Building Materials ◽  
Lightweight Aggregate ◽  
High Strength ◽  
Building Construction ◽  
Lightweight Aggregate Concrete ◽  
Construction Sector ◽  
Structural System ◽  
Aggregate Concrete ◽  
Light Weight Aggregate ◽  
Usage Area

Thermal insulation building materials that is both lightweight and high strength is the key to the future of China's construction sector in achieving energy conservation. In terms of building construction, when comparing lightweight aggregate concrete to that of ordinary concrete, light weight aggregate is lighter, has a large structure span, good seismic performance, saving cost and other advantages; Ceramsite concrete is a type of lightweight aggregate concrete. Also because the shaped column is not ridge, is able to increase the amount of usage area, due to being light is energy efficient, therefore is in line with the wall reformation and is thus preferred. Upon combining these two characteristics, the analysis of the Ceramsite concrete shape columns properties and its prospect for development.

scholarly journals Industrial Wastes-Cum-Strength Enhancing Additives Incorporated Lightweight Aggregate Concrete (LWAC) for Energy Efficient Building: A Comprehensive Review

2021 ◽  
Vol 14 (1) ◽  
pp. 331
Author(s):  
Rajesh Kumar ◽  
Abhishek Srivastava ◽  
Rajni Lakhani
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Building Materials ◽  
Lightweight Aggregate ◽  
Industrial Wastes ◽  
Lightweight Aggregate Concrete ◽  
Future Research ◽  
Construction Sector ◽  
Mineralogical Characterization ◽  
Aggregate Concrete

Lightweight aggregate concrete (LWAC) exhibits the advantages of thermal insulation, reduces energy consumption building costs, improves building efficiency and easy construction. Furthermore, the utilization of industrial wastes in concrete is advantageous in terms of environmental sustainability. In order to explore this, several researchers investigated the idea of integrating industrial wastes in LWAC. However, the lack of knowledge regarding the performance of industrial waste-based lightweight aggregate concrete hinders the adaptation of this concept and application of LWAC in the construction sector. Therefore, this paper summarizes the research in relation to the sustainable LWACs containing oil palm shell (OPS), lightweight expanded clay aggregate (LECA), vermiculite, perlite, pumice and sintered fly ash as lightweight aggregate, along with industrial wastes and strength-enhancing additives (viz. fibers, polymers, etc.). Firstly, desirable physical, chemical, morphological and mineralogical characterization of different lightweight aggregates are presented, and then a comprehensive overview on fresh, hardened, durability and thermal properties of LWAC incorporating industrial wastes are discussed in comparison with normal weight concrete. The review also highlights the current challenges and suggests the research gaps for further development of eco-friendly LWAC. It is concluded that vermiculite, perlite, pumice, OPS, sintered fly ash and LECA with some suitable industrial waste materials have the potential to be used in the construction sector. Moreover, LWAC with industrial waste has 50–65% lower carbon emission (kg CO2 eq/m3) in the environment. The scientific contribution of this paper provides insights into different LWACs and the knowledge base for future research and paradigm shift of using LWACs as more common alternative building materials.

Effect of confinement on the behaviour of high-strength lightweight concrete columns

1986 ◽  
Vol 13 (6) ◽  
pp. 741-751 ◽  
Author(s):  
R. Basset ◽  
S. M. Uzumeri
Keyword(s):  
Experimental Investigation ◽  
Lightweight Concrete ◽  
Concrete Strength ◽  
Lightweight Aggregate ◽  
High Strength ◽  
Concrete Columns ◽  
Lightweight Aggregate Concrete ◽  
Test Results ◽  
Aggregate Concrete ◽  
Concrete Confinement

This paper summarizes an experimental investigation into the behaviour of high strength sand – lightweight concrete columns confined with rectangular ties. Fifteen reinforced and three unreinforced specimens were tested under monotonically increasing axial compression. Variables considered in this study were the longitudinal steel distribution and tie configuration, the tie steel spacing, the amount of tie steel, and the amount of longitudinal steel.The results indicated that unconfined high-strength lightweight aggregate concrete is a brittle material. The addition of lateral confining steel significantly improved the behaviour of this material, with a large amount of lateral steel resulting in very ductile behaviour. The tie configuration and resulting distribution of longitudinal steel contributed significantly to the confinement of concrete, with well-distributed steel resulting in improved behaviour. The ratio of specimen to cylinder concrete strength was observed to be 0.98, which is much higher than the commonly assumed value of 0.85.The test results were compared with results from selected theoretical confinement models. Based on the results of this investigation, existing models for concrete confinement give unconservative results for high-strength lightweight aggregate concrete and overestimate the ductility that can be achieved with this material. Key words: columns, confinement, ductility, high-strength concretes, lightweight aggregate concretes, reinforcement, stress–strain relationships, tests, ties, toughness.

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