Durability Performance Of Lightweight Aggregate Concrete For Housing Construction

Durability can be defined as the ability of material to withstand the effects of its environment. In the building material its may be interpreted as chemical attack, water absorption and carbonation

Development Of Oil Palm Rusk Ash Used As Possible Components Into Blended Cements

The main objective of this research is to investigate the use of waste material as a partial cement replacement in concrete

Comparative Study Between Flowable High Strength Mortar and Flowing High Strength Concrete

This paper presents the results of an investigation aimed to evaluate the comparison between high strength flowing concrete (HSFC) and high strength flowable mortar (HSFM) from the view of density, compressive strength and flexural strength at the age of 7 and 28 days. The results illustrate that the use of Silica fume (10 % as a partial replacement of cement) and superplasticizer (1.6- 2.2% of cementitious materials) gives the properties of high flowability with the high strength for each of concrete and mortar mixes. Besides, the compressive strength and flexural strength for each of mortar and concrete have been enhanced by the inclusion of silica fume

Behavior Of Flowable High Strength Concrete Repair Material For Sustainable Engineering Construction

Steel fibers in concrete is known for its potential ability to enhance the concrete material for increasing their flexural toughness, energy dissipation and have high impact resistance for many structural applications especially in building repairs and other civil engineering works

Production of durable high strength flowable mortar reinforced with hybrid fibers

This study deals with the production of durable high strength flowable mortar (HSFM). Firstly, the optimum percentage of silica fume was determined due to Pozzolanic Activity Index (P.A.I) test. Secondly, the selected mortar reinforced by different percentages of steel fibers or hybrid fibers of  steel fibers , palm fibers and synthetic fibers (Barchip) to prepare HSFM mixes. Such mixes were tested in compressive strength, splitting tensile strength, static modulus of elasticity, flexural strength, toughness indices determination, and impact load for all the mixes. Lastly, the effects of seawater exposure on the properties of HSFM have been observed. The results show that the use of 10% silica fume as a partial replacement of cement indicate the best P.A.I. On the other hand, the hybridizations of such fibers enhance the performance of HSFM mixes. In addition, the hybrid fibers reduce the permeability of HSFM leading to significance improvement against seawater exposure

Rational Mix Design of Lightweight Concrete for Optimum Strength

In this study, structural lightweight concretes produced by Coarse lightweight Crushed brick and Fine light weight crushed brick (CLWA & FLWA) were investigated

Properties of High Strength Flowable Mortar Reinforced With Different Fibers

An experimental study was conducted on the high-strength flowable mortar (HSFM) reinforced by the different percentages of palm Fiber (0, 0.5& 1%), steel fiber (0, 0.5, 1.0& 2%), and the hybridization of these two fibers with 2% volumetric fractions.  Different tests have been done to determine some aspects namely the density, compressive strength, splitting tensile strength, static modulus of elasticity, flexural strength, toughness and ultrasonic pulse velocity.  The results show that the use of hybridization of steel fiber with palm fiber gives an unambiguous improvement in these properties and thus the optimum percentages for these two fibers have been taken into consideration. The use of low volume fraction of palm fiber in hybrid fiber mixes was found to be a promising concept in HSFM mixe

Natural fiber as a fibrous reinforced in polymer modified mortar : a review / Azamuddin Husin, Mahyuddin Ramli and Cheah Chee Ban

The disadvantages of cement based material are due to its brittleness, thus perform low tensile strength and poor fracture toughness. This poor performance can be improved by using fiber as reinforcement. Fiber such as carbon fiber, glass fiber is widely used to enhance the properties of the cement-based material, especially in the form of thin sheet/plates. While global scenario has intensively moved towards green buildings, it is possible to use our local resources. It is to innovate local green building materials such as using natural fiber from agricultural waste such as oil palm fiber, coir fiber, kenaf and wood fiber. Therefore, this paper highlights the review of the literature regarding the use of natural fiber in polymer-modified mortar

DELAYS FACTORS IN CONSTRUCTION PROJECTS DEVELOPMENT: THE CASE OF KLANG VALLEY, MALAYSIA

The problem of project delays in construction industry is a global phenomenon; Malaysia is no exceptional. Delays are always considered as costly to all parties involved in the project and very often it will results in dispute, claims, total abandonment and blight the feasibility for project owners and retard the development of construction industry. Therefore, the objectives of this paper are to identify the main causes and contributor to the project delays because delays can be minimized only when their causes are identified. Moreover, it is also aimed to investigate the most critical stage throughout the process of project development pertaining to the project delays as well as to recommend various methods that could be adopted by the construction industry players to mitigate the problems. In order to achieve the said objectives, a total of twenty one factors of delays which was then grouped under owner related, contractor related and consultant related delay factors and ten methods to mitigate the project delays were based on literature review. The structural questionnaires were distributed to the targeted respondents in Klang Valley, Malaysia. The findings from this paper shown that owner’s slow in decision making was perceived to be the most significant factor and main causes to the project delays. All of the respondents claimed that working drawing stage being the most critical stage in governing all of these owner’s related delay factors. Besides that, the contractor is deemed to be the main contributor to the project delays in Malaysia construction industry. It is assumed by all of the respondents that the contractor should be responsible for any delays at the construction stage which is considered as the most critical stage in governing the project delays. In order to mitigate the project delays, awarding bids to the right and experience contractor was suggested to be the utmost effective solution in resolving those contractor’s related delay factors.CSFs; Project delay, construction industry, construction project development, mitigates delays, Malaysia

Penggunaan Debu Kaca Sebagai Sebahagian Bahan Pengganti Simen Di Dalam Konkrit - Ciri-Ciri Kejuruteraan.

The main objective of this research is to investigate the use of waste material as a partial cement replacement in concrete. Objektif utama kajian ini adalah untuk mengkaji sama ada penggunaan bahan terbuang di negara kita ini sesuai untuk dijadikan bahan pengganti kepada simen di dalam konkrit