A review on performance of waste materials in self compacting concrete (scc)

Self-compacting concrete (SCC) was first developed in late 80’s in Japan. SCC is well known for its self-consolidation and able to occupy spaces in the formwork without any vibration and become new interesting topic in Construction and Building Materials Research. There were various SCC researches that have been carried out in Turkey, Malaysia, Thailand, Iran, United Kingdom, Algeria, and India.The aim of this review is to summaries the alternative material used in the mix design from 2009 to 2015 through available literature. It hascommon materials such as Limestone Powder (LP), Fly Ash (FA), Silica Fume and Granulated Blast Furnace Slag (GBFS). While there are many alternative or recycled material can be used in producing SCC. This review only focus on waste material fromMarble Powder (MP), Dolomite Powder (DP), Crump Rubber (CR), Recycled Aggregate (RA) and Rise Husk Ash (RHA).Each type of materialshassimilarity effect in fresh and hardened state of SCC. Therefore, this paper will provide significant and useful information to those new to SCC and fellow researchers for future studies on SCC

Fine recycled concrete aggregate as a material replacement in concrete production

As a fast and rapid growing nation, Malaysia undergoes a lot of development especially in construction field. Most of the building nowadays are being made mainly using concrete as it provides many favorable features such as satisfactory compressive strength, durability, availability, versatility and cost effectiveness. However, in pursuing the development era, sometimes the authorities overlooked about the construction and demolition (C&D) waste that had been created along the development progress. Construction and demolition waste is becoming a vital issue especially to the environmental aspect in many large cities in the world (Chen et al., 2002). Shen [1] describe C&D waste as the waste which generated from renovation, site clearing, demolition, construction, roadwork, land excavation and civil and building construction. Construction and Demolition (C&D) waste constitutes a major portion of total solid waste production in the world, and most of it is used in landfills .

A review on performance of waste materials in self compacting concrete (scc)

Self-compacting concrete (SCC) was first developed in late 80’s in Japan. SCC is well known for its self-consolidation and able to occupy spaces in the formwork without any vibration and become new interesting topic in Construction and Building Materials Research. There were various SCC researches that have been carried out in Turkey, Malaysia, Thailand, Iran, United Kingdom, Algeria, and India.The aim of this review is to summaries the alternative material used in the mix design from 2009 to 2015 through available literature. It hascommon materials such as Limestone Powder (LP), Fly Ash (FA), Silica Fume and Granulated Blast Furnace Slag (GBFS). While there are many alternative or recycled material can be used in producing SCC. This review only focus on waste material fromMarble Powder (MP), Dolomite Powder (DP), Crump Rubber (CR), Recycled Aggregate (RA) and Rise Husk Ash (RHA).Each type of materialshassimilarity effect in fresh and hardened state of SCC. Therefore, this paper will provide significant and useful information to those new to SCC and fellow researchers for future studies on SCC

An overview on audio steganography techniques

Steganography is a form of security technique through obscurity; the science and art of hiding the existence of a message between sender and intended recipient. Steganography has been used to hide secret messages in various types of files, including digital images, audio and video. The three most important parameters for audio steganography are imperceptibility, payload (bit rate or capacity), and robustness. Any technique which tries to improve the payload or robustness should preserve imperceptibility. The noise which is introduced due to bit modification would limit payload. This paper presents a categorization of information hiding techniques and overviews those techniques that intend to improve payload and imperceptibility

Satu Kajian Tentang Hubungan Antara Pengurusan Kurikulum Dengan Prestasi Akademik Dalam Organisasi Pendidikan

This research was conducted to investigate whether a systematic and an effective curriculum management system, is being practiced in schools today. Besides, it is also to find out the correlation between a systematic curriculum management and the academic performance of the schools. The respondents of this research were sixty senior teachers and ninety head panel teachers of respective subjects being selected from fifteen Grade A government schools in the Kuala Muda district. Two sets of different questionnaires were used in this research. One set was distributed to the senior teachers and another set was distributed to the head panel teachers, to investigate the curriculum management system being practiced in their schools. The data was processed using the SPSS 10.00 for Windows software and analysed by using the Descriptive Statistic as well as the correlation method to observe the relationship between the curriculum management system and the academic performance. The main findings of this research showed that all schools involved in this research practiced the curriculum management system as suggested and the findings also showed a positive correlation between the curriculum management system and the academic performance of the schools. This finding indicated that the academic performance of the schools would increased as a result of an effective curriculum management system. Suggestions and recommendations were made to all especially those who were involved in the curriculum management at school level, to further analyse and make changes wherever possible to ensure that the maximum effectiveness would be achieved through this system and thus would increase the academic performance of students in their schools

Microemulsion Polydispersion Due to Polymer Solubilization

Freeze-fracture electron microscopy results on water-in-oil microemulsion showed that significant polydispersion can be induced by adding water soluble polymers

Relationship between ae signal strength and absolute energy in determining damage classification of concrete structures

The most efficient tools in real monitoring system is acoustic emission (AE). This technique can be used to identify the damage classifications in RC structure. This research paper will mainly focus on the utilization of signal strength and Absolute energy (AE signal) in determining on the damage quantification for RC beam subjected to cyclic load test. The beam specimens size (150 X 250 X 1900) mm were prepared in the laboratory and tested with the four point bending test using cyclic loading together with acoustic emission monitoring system. The results showed that the analysis of AE data parameters is capable of determining the damage classification in concrete structures and the data corresponded to the visual observations during the increased loading cycle

Behaviour of steel fiber reinforced concrete slab due to volume fraction of fiber

Generally, fibers are commonly used in engineering material. The characteristics and properties of fiber influence the properties concrete. This has been proven by the previous research. In this research steel fiber is used to study the behavior of reinforced concrete slab due to volume fraction of fiber subjected to flexural test based on computer simulation. The application of steel fiber reinforced concrete in civil construction is the most popular due to its improvement in resistance to cracking, fatigue, abrasion, impact, durability, and conventional reinforced concrete. In this investigation,finite element simulation will be used to analyze the normal reinforced concrete slab and steel fiber reinforced concrete slab due to diffrent percentage of volume fraction with 1%, 1.5%, 2%, 2.5% and 3%. Through this simulation, the loading is applied and analyzed by the increments of every 2 KN up to ultimate failure. The results are obtained from the computer programming simulation and being compared with published experimental results. The result of the analysis indicates that, by using and adding steel fiber into the conventional reinforced concrete, it will influence the ductility, toughness, energy absorption and strength of the concrete

Micro-Entrepreneur: Motivations, Challenges and Success Factors

Micro-enterprise plays an important role in contributing toward a stable and sustainable social and economic community environment. A core of small enterprise, particularly micro-enterprise (five or fewer employees), is needed to build and maintain the sustainability of social cultural, environment and economic development of communities. The purpose of this study is to examine the motivations, challenges and key success factors for micro-entrepreneur in Kedah and Perlis. The micro-entrepreneur reveals that they are motivated to increase their income at the time they entering their business. Manage the business well and customer services as the key of success factors in their business. More than that, scarcity of financial resources in their business is a challenge to them

Investigation on the performance of crushed tires as cement replacement in concrete

The automobile has become an indispensable means of transportation for many households throughout the world. Thus, the disposal of vehicle tires represents a major environmental issue. Globally, more than 330 million tires are discarded every year and accumulated over the years in different countries [1]. In Malaysia, an estimated 150,000 tonnes of waste tires per year are dumped illegally. The disposal and reprocessing of tires are difficult since they contain complex mixtures of different materials such as rubber, carbon black, steel cord and other organic and inorganic minor components .