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Ling J.H.,Kolej Laila Taib | Abd. Rahman A.B.,University of Technology Malaysia | Ibrahim I.S.,University of Technology Malaysia | Abdul Hamid Z.,Construction Research Institute of Malaysia
Construction and Building Materials | Year: 2012

This paper presents the behaviour and performance of grouted splice connection. A sleeve is utilized to confine the splicing of two discontinued bars, and as a result, the bond performance between the bars and the bonding material can be improved. Two new sleeves, fabricated from standard size steel pipes, were proposed and the grouted splice specimens were tested under incremental tensile load until failure of the specimens, either by bar bond-slip or bar fracture failure. The behaviour of the specimens, which is represented by the load-displacement response, is discussed, and it is found that the geometrical configurations of the sleeve provide significant influence to the bond performance due to the effects of confinement generated by the sleeve. © 2012 Elsevier Ltd. All rights reserved. Source

Ling J.H.,University Malaysia Sarawak | Abd. Rahman A.B.,University of Technology Malaysia | Ibrahim I.S.,University of Technology Malaysia | Abdul Hamid Z.,Construction Research Institute of Malaysia
Engineering Structures | Year: 2016

This study tests grouted splices connected by two types of sleeves, namely Welded Bar Sleeve (WBS) and Tapered Head Sleeve (THS). These sleeves are made from non-proprietary pipe sections, where (a) WBS is fabricated by welding the deformed bars to the inner wall of the pipe, and (b) THS is made tapered with smaller openings at both ends. To study the behavior, the splice specimens were tested under incremental tensile load at various bar embedded lengths and sleeve diameters. The degree of confinement generated in the sleeve is found to increase with decreasing sleeve diameter. This improves the bond strength in sleeve, which subsequently increases the tensile capacity of the splice. THS gives a 30% higher tensile capacity compared with WBS. With the active confinement, the required bar embedded length of the splice can be reduced to 8 times the bar diameter. An analytical model is formulated on the basis of the confinement stress as expressed in a function of sleeve dimensions. The model is used to predict the tensile capacities of the splices at a variation range of ±10% of the experimental results. This verifies the correlations among the sleeve dimensions, the confinement stress and bond strength of the grouted splice. © 2015 Elsevier Ltd. Source

Azman M.N.A.,Sultan Idris University of Education | Zaihidee F.M.,Sultan Idris University of Education | Nawi M.N.M.,Northern University of Malaysia | Kamar K.A.M.,Lafarge | And 4 more authors.
Jurnal Teknologi (Sciences and Engineering) | Year: 2014

The wide use of machine and machinery in the construction industry can reduce the dependency on foreign workers. The Construction Industry Development Board is formulating a strategic plan to promote the use of machine and machinery in the construction industry. Therefore, this study aims to study the level and status of the usage machine and machinery among the G7 contractors at construction sites. The instrument used in the study consist of questionnaire and interviews. Based on the literature findings, there are 9 types of machine and 9 types machinery used in the construction industry. The percentage use of machine and machinery as well as the level of mechanisation for each phase of construction is at level 1, where the machine and machinery is still driven by the operator and do not involved high technology. The main recommendation in this study is to provide training on the latest information on machine and machinery and CPD (Continue Professional Development) training to promote the use of machine and machinery. In addition, the offering better incentives such as tax breaks and loan facilities should be awarded and provided by the government to activate the economic growth. © 2014 Penerbit UTM Press. All rights reserved. Source

Kamar K.A.M.,Construction Research Institute of Malaysia
WIT Transactions on Ecology and the Environment | Year: 2012

The adoption of sustainable construction and green buildings has become an important issue in Malaysia in recent years and has been duly highlighted under the Malaysian Construction Industry Master Plan (2005-2015). This paper highlights current initiatives taken by the government and private sectors in Malaysia to encourage the adoption of sustainable development and green buildings. Leads by the Construction Industry Development Board Malaysia (CIDB), the government of Malaysia has establishment a technical committee and eco-label task force to create guideline for good practices in sustainable construction and green buildings and to develop eco-label accreditation scheme for construction materials. The challenges of the adoption are lack of skill and capacity, overlapping of roles among the government agencies, slow industry follows through on government programs, lack of research and innovation, and cost versus benefits in term of implementation of green technology. Finally, the way forward to accelerate the adoption are to establish green public procurement, to encourage Research and Development (R&D) in related field, to educate and change public perception and mindset, to adopt life cycle costing and Industrialised Building System (IBS) method of construction and to provide legislative and financial framework for sustainable development and green building. © 2011 WIT Press. Source

Hamid N.H.A.,University Technology of MARA | Mohamad N.M.,University Technology of MARA | Hamid Z.A.,Construction Research Institute of Malaysia | Ghani S.H.A.,Construction Research Institute of Malaysia
Malaysian Construction Research Journal | Year: 2014

A full-scale of single bay double-storey house (5.1m × 4.5m × 3.9m) was constructed using precast shear key wall panel and cast-in-situ concrete for column, floor slab and foundation beam at Construction Research Institute of Malaysia (CREAM), Malaysia. This building is designed using British Standard (BS8110) which did not have any provision for seismic loading and no specific detailing connections at its joint. The aim of this study is to determine the global seismic behaviour of non-ductile double-storey house under quasi-static lateral cyclic loading. Two actuators were attached to strong wall and they were simulated using inplane lateral cyclic loading and control displacement method. Fourteen(14) linear potentiometers were used to measure lateral displacement of precast wall panels and twenty six(26) strain gauges were used to monitor strain in steel and concrete. The experimental results showed that the house reached yield displacement at 0.3% drift and yield strength at 220kN. A lot of cracks were observed at shear key wall-column joints and wall-beam joints. The ultimate lateral strength of the structure recorded as 250kN with ultimate lateral drift of 0.4%. The house started to loss its strength known as strength degradation at 0.5% drift and became unstable at 0.7% drift. The biggest opening crack width is 15.95mm was measured at wall-column joints of second floor. The precast shear key wall panel has bigger crack width and low lateral strength capacity because it did not connect with any extruder bars from foundation beam. As a result, the shear key wall panel will collapse in out-of-plane direction and experience severe damage under medium and high intensities of ground motion. As a conclusion, this type of house can only survive under low magnitude of earthquake loading with PGA=0.08g and long distant-earthquakes which centered in Sumatra, Indonesia. Source

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