A Review Factors Affecting Building Defects of Structural Steel Construction. Case Study: Student Accommodation in UiTM Perak

AbstractIn Malaysia, building condition survey is currently vastly underrated and ignored by owners, managers and professionals. The building owners or facilities managers has identified that the complaints about building defects have gone up in recent years with common problem such as leaky roofs and walls, dampness and water penetration from the upper toilet, crack at floor slab and others. This paper presents a brief description of building defect in use of student hostels in UiTM Perak. The main objective is to highlight the important problems and suggest a possible remedial work and increased the awareness of building owners regarding building condition survey and its relation to building maintenance management. The building condition survey will take quite a range of Building Surveyor specialist equipment to seven hostel buildings in UiTM Perak. This paper has gained an insight into a better understanding of factors affecting building defects of structural steel construction. It also explores opportunities for improving the understanding of building surveying profession in our country

Effect of kaolin addition on the performance of controlled low-strength material using industrial waste incineration bottom ash

Incineration of industrial waste produces large quantities of bottom ash which are normally sent to secured landfill, but is not a sustainable solution. Use of bottom ash in engineering applications will contribute to sustainability and generate revenue. One way of using the industrial waste incineration bottom ash is in controlled low-strength material (CLSM). Use of bottom ash in CLSM has problems related to bleeding and excessive strength development and so an additive has to be used to control bleeding and strength development. The main objective of this research is to study the effect of kaolin addition on the performance of CLSM made using industrial waste incineration bottom ash. CLSM mixes were made with bottom ash, cement, and refined kaolin. Various tests were performed on the CLSM in fresh and hardened states including compressive strength, water absorption, California bearing ratio (CBR) and the tests for concentration of leachable substances on the bleed and leachate. The compressive strength of CLSM tested ranged from 0.11 to 9.86 MPa. CBR values ranged from 6 to 46, and water absorption values from 12 to 36. It was shown that the addition of kaolin delayed the initial setting time of CLSM mixtures, reduced bleeding, lowered the compressive strength, and increased the values of water absorption, sorption, and initial surface absorption. The CLSM tested did not have corrosivity. It was shown that the hardened CLSM was non hazardous, and the addition of kaolin increased the concentration of heavy metals and salts in the bleed and leachate

Corrosivity and leaching behavior of controlled low-strength material (CLSM) made using bottom ash and quarry dust

This paper reports the corrosivity and leaching behavior of CLSM made using two different industrial wastes i.e. bottom ash from an incineration facility and quarry dust. The leachate samples were derived from fresh and hardened CLSM mixtures, and studied for leaching and electrical resistivity. The release of various contaminants and the consequent environmental impact caused by the contaminants were studied by the measurement of contaminants in the bleed, in the leachate at 28 days, and on the leachate derived from crushed block and whole block leaching done over a period of 126 days. Results indicated that the CLSM mixtures are non corrosive; diffusion was the leaching mechanism; and the contaminants were found to be moderate to low mobility. © 2013 Elsevier Ltd