Advantages of Using Hybrid System Method in Industrialised Building System (IBS)

Hybrid System method is one of the technology implements in Industrialised Building System (IBS). Methods has been acquaint in many ways in order to improve Industrialised Building System (IBS) in Malaysia. Other country such as United Kingdom also have used the term Hybrid for their concrete process known as Hybrid Concrete Construction (HCC). While in Malaysia, Hybrid System comes with a method that combines one component with two different method which are the precast component and cast-in situ method. This two combination method has called a Hybrid System method and started implements by Jabatan Kerja Raya (JKR) for mostly a government projects in Kedah state in Malaysia on 2017. Industrialised Building System has been well known as a fast completion, saving cost, and less labour needed in construction. However, the issues by using Hybrid System method has double up the time completion, splurging the cost, and enlarge the labour since it needs to cast-in situ the components, let the concrete cured and more material usage. The significance of study for this research is the new method of IBS Hybrid System is a pilot project in Kedah by JKR. Thus, this research is to control the delay involves in projects that apply IBS Hybrid System. Hence, this paper is to identify the advantages of using Hybrid System method in Industrialised Building System (IBS).

Nonlinear soil-structure behavior of a deployable and compliant anchor system

This paper presents a novel compliant geo-structural systems bio-inspired by awns on grass seeds for increasing anchor capacity while minimizing material usage. A compliant deployable structure is here defined as a system that reacts to global displacements by continued elastic shape change and awns are slender flexible structures rigidly connected to the exterior of an anchor. When the anchor is loaded in tension, the awns react off the soil mass and deploy outwards from the pile shaft, enabling space-saving measures for transportation. This paper creates a structural pushover model to establish awn deformations and stress values, a scale model of the compliant system fabricated using additive manufacturing, geo-plasticity numerical models of soil awn interaction, and a finite element model of an example application. This research elucidates the soil displacement mechanisms around the awns, the structural deformation of individual awns, and the enhancement of overall anchor capacity due to awn deployment.

Characteristics of Waste Generated in Dimension Stone Processing

Natural dimension stone processing generates large volumes of stone waste, which have a significant impact on the environment, as well as on the efficiency and profitability of the stone-processing plant. The article presents the characteristics of waste produced as a result of natural dimension stone processing and the structure of the waste production process. Solid stone scraps and sludge were distinguished. On the basis of the performed analyses, it was shown that stone waste constitutes 10–35% in relation to the quantity of the processed stone material, with the quantity of sludge being even threefold greater than the volume of solid scraps. According to the circular economy principles, the aim should be to reduce the amount of waste generated by reducing primary resources in favour of secondary material. Reducing the volume of stone waste is possible through rational planning of stone production while at the same time maximising the efficiency of stone material usage and introducing the most modern processing machines. This significant volume of stone waste encourages efforts to find solutions for both its management and reduction. This paper reviews the utility potential of stone waste. Sensible use of waste is important to increase the profitability and productivity of processing plants while incentivising environmental protection.

The relationship between instructional materials usage in teaching and learning outcome in history subject within secondary schools in Rwanda

The effective usage of instructional materials plays a significant role in promotion of teaching and learning outcomes. The usage of relevant material stimulates students to become more attentive and motivated in classroom setting. The purpose of this study was therefore to find out the relationship between instructional materials and learning outcomes. The study employed correlation research design. The target population was 621 respondents out of which 244 were used as the sample size. Simple random and purposive sampling techniques were used in the study to obtain the sample size. Questionnaire, interview guide and desk review was used data collection instruments. SPSS was used in data management. The findings revealed that visual aids are used at moderate level at which 49.9% strongly agreed that instructional materials used are pre-determined 47.2% strongly agreed that teaching methods are well prescribed in the lesson planning. The study indicated that a big number of students got the grades lying in division IV and Division U (Unclassified). The study found that 81% of the respondents agreed that students participated in history lesson and 70.0% agreed that students understood history. Results also revealed that holding instructional material usage constant to a constant zero, attendance from Monday to Friday would be at .116 for lesson plan. An increase in instructional material usage stimulates adequate ratio by a factor of 0.11 standardized significance at learning process. The study recommended that the government should allocate sufficient budget that would be given to ameliorate libraries in secondary schools and laboratories. The government should find resource centers to facilitate teaching staff borrow instructional materials which cannot not available in secondary schools. Further, the government should conduct workshops, conferences and meeting to stimulate their skills on using instructional materials. School principals should follow up their teaching staff to be sure with the availability of instructional materials are effectively applied. The community should encourage parental involvement in providing instructional material usage in secondary schools in order to enhance learning outcomes. Keywords: Instructional materials, Teaching and learning outcomes and usage of instructional materials.

Photovoltaics: towards ultimate performances

Photovoltaic conversion has made impressive progress since its discovery, but as will be discussed here, much can still be done. It is of interest to investigate what are the intrinsic limits of the technology. We call here ultimate performance those that could be limited only by intrinsic properties of the devices. This point will be discussed along three lines: ultimate limits for energy conversion, ultimate limits for material usage and ultimate limits for device stability.

Facilitating circular site preparation; developing the instrument PrCiSi

The urge to strive for closed material loops is felt in the construction industry. However, before the built environment can be regarded as circular, not only the material usage in buildings, but also preparations taken on sites need to be circular. In this paper a new instrument is presented to help project leaders at municipalities and contractors to assess how circular their process of site preparation is. The instrument, by the name of PrCiSi, has been developed on basis of a literature study on sustainable material usage and interviews among stakeholders in this niche market. The instrument has been tested on the site preparation processes for the residential neighbourhoods Olstergaard and Noorder Koeslag in the municipality of Olst-Wijhe. Of course, there is still room for improvement and more test cases are welcomed, but three main subjects, namely materials, equipment and personnel, seem to form a proper basis. A large number of test cases might help us to further develop the scoring system. However, being convinced that we can cross a boundary here, we are happy to share with you the current status to inspire you to use and improve this instrument with us.

Developments to come to a circular construction economy; experiences in facilitating a local soil and sand depot

In the construction industry the ambition to come to a circular economy will, with its vast material usage, be a hard nut to crack. This paper describes a research project part of the H2020 Cityloops project, in which it was expected that soil and sand depots could be an interesting subject to study. Already for many years and in multiple municipalities, these depots help to overcome mismatches regarding quality and quantity in demand and request of soil and sand. With the ambition to close material loops the construction industry might experience these kinds of mismatches also for an increasing number of other resources in the nearby future. Having positive experiences with her soil and sand depot, the municipality of Apeldoorn was open to give insights in the flows at her open-air soil and sand depot. The conducted research helped making processes transparent and valuable insights were gained. However, considering the great variety in building materials, products and components, it currently seems possible to handle only a small number of other material flows in the same way soil and sand are being handled and stored at a depot.

A Conceptual Framework for Greener Goldmining through Environmental Management Accounting Practices (EMAPs): The Case of Zimbabwe

Goldmining contributes substantially to the Gross Domestic Product (GDP) of the Zimbabwean economy through revenue generated from exports, however it also incurred numerous challenges to the environment. Amongst others, these challenges embody ecological degradation; water and air pollution; and depletion of natural resources. In this paper, we establish the effects of mining operations on the environment through a comprehensive literature review, and how the integration of environmental management accounting practices (EMAPs) such as material flow cost accounting (MFCA), life cycle costing (LCC), and activity-based costing (ABC) could be integrated into a conceptual framework to address environmental challenges. EMAPs were chosen as they generate both physical and monetary data, which could promote transparency in material usage within the goldmining sector. Our analyses revealed a substantial body of literature on separate and individual EMAPs, yet very little was found on the integration of EMAPs. The main contribution of this work is the development of an integrated conceptual EMAPs framework on the strength of sets of qualitative propositions, aimed at promoting green goldmining for Zimbabwe as a developing economy. Future work would involve the validation of the framework among key stakeholders in the Zimbabwean goldmining industry.

A Review on Utilizing the Marine Biorefinery Waste in Construction Raw Materials to Reduce Land Pollution and Enhance Green Environment

This research mainly concentrates on eco-friendly construction material. Production of cement and concrete industries release huge amount of carbon dioxide (CO2) and greenhouse gases which affect the environment and also there is a demand in construction material by man-made or nature. The construction sector finds an economic and eco-friendly cement replacement material to achieve the demand for green concrete that improve the energy conservation and better energy saving material. In marine Bio-refinery waste produce huge quantity of calcium carbonate, whose disposal is cause of major concern. Pre-eminent solution for this problem is utilizing the marine shell waste in cement and concrete. It revises the manufacturing process to reduce the raw material usage in production and adoptable material for global warming. Therefore, the researchers focus on marine waste sea shells as the replacement material in construction industry to save the energy and also give sustainable green material. As per the previous studies by the researchers to determine the chemical composition, specific gravity, water absorption, particle size distribution of seashells and also compressive, flexural and tensile strength of concrete. It shows the seashell is filler material that slightly increases the strength when compared to the conventional materials and therefore the sea shells are suitable for the construction field to manufacture the cement and concrete with eco-friendly manner.