scholarly journals Diabase Mud-Based Geopolymer Paste: Formulation and Properties

2021 ◽  
Vol 5 (1) ◽  
pp. 77
Author(s):  
Maria Spanou ◽  
Salmabanu Luhar ◽  
Pericles Savva ◽  
Socrates Ioannou ◽  
Michael F. Petrou ◽  
...  
Keyword(s):  
Construction Industry ◽  
Material Selection ◽  
Value Added ◽  
Vital Role ◽  
Waste Utilization ◽  
Building Construction ◽  
Sustainable Building ◽  
A Value ◽  
Analytical Research ◽  
Geopolymer Paste

The concepts of sustainability and waste utilization have received urgent attention in the European construction industries. Material selection plays a vital role in the manufacturing process of sustainable building construction. The general objective of this study is the transformation of waste diabase mud into a value-added product. The diabase mud was characterized, and different parameters were selected for the cement, as well as the metakaolin in the mixture. This paper includes analytical research results of a geopolymer paste embedded with diabase mud waste material as its precursor, and a combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as its alkaline activators to form a geopolymeric system. The compressive strength of the optimum mix sample was recorded as 14.0 MPa at 72 h. The embedding of a diabase mud into a geopolymer resulted in a viable composite for use in the construction industry.

scholarly journals Forest Product Industry and Engineered Wood Products: The Nigerian Experience

2021 ◽  
Vol 25 (1) ◽  
pp. 93-97
Author(s):  
O.O. Ekundayo ◽  
C. Arum ◽  
J.M. Owoyemi
Keyword(s):  
Value Added ◽  
Wood Products ◽  
Forest Product ◽  
Building Construction ◽  
Sustainable Building ◽  
Wood Processing ◽  
Engineered Wood Products ◽  
Engineered Wood ◽  
Forest Product Industry ◽  
Product Industry

The forest product industry in Nigeria is barely surviving rather than thriving. Faced with a lot of challenges, the industry has witnessed the closure of many wood processing industries while a few are operating at low capacity. This paper examines engineered wood products and the outlook on wood and wood products in Nigeria. It discusses some of the challenges that have inhibited the growth of the industry and provides recommendations for reinventing the industry through development of modern value-added wood products for sustainable building construction. Keywords: Collaboration; Engineered wood products; Forestry product industry; Glulam; Sustainability.

scholarly journals Parametric design of an additively manufactured building facade for bespoke response to solar radiation

2021 ◽  
Vol 2042 (1) ◽  
pp. 012180
Author(s):  
Bharath Seshadri ◽  
Ina Cheibas ◽  
Matthias Leschok ◽  
Valeria Piccioni ◽  
Illias Hischier ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Construction Industry ◽  
Parametric Design ◽  
Material Selection ◽  
Ghg Emissions ◽  
Digital Fabrication ◽  
Building Construction ◽  
Robotic Fabrication ◽  
New Buildings ◽  
Combination Of Material

Abstract The building construction industry is adapting Additive Manufacturing (AM) and robotic fabrication techniques to, among other efficiency and cost benefits, reduce the lifecycle Green House Gas (GHG) emissions of new buildings. This research aims to fabricate a low- GHG emission façade by encoding environmental performance using a combination of material selection, AM techniques, and bespoke geometry. This paper presents the design methodology, specifically the response to solar radiation (i.e. shading and daylight transmission). The key contribution of this publication is establishing the digital fabrication process of AM facades: beginning with performative parametric design, using empirical Bi-directional Scattering Distribution Function (BSDF) data of AM thermoplastic elements for daylight simulation to assess performance, and finally optimising the topology for a specific context (location and orientation).

scholarly journals Integrated Evaluation of the Impediments to the Adoption of Coconut Palm Wood as a Sustainable Material for Building Construction

2020 ◽  
Vol 12 (18) ◽  
pp. 7676 ◽  
Author(s):  
Mahmoud Sodangi ◽  
Zaheer Abbas Kazmi
Keyword(s):  
Construction Industry ◽  
Building Material ◽  
Building Materials ◽  
Matrix Multiplication ◽  
Green Building ◽  
Coconut Palm ◽  
Building Construction ◽  
Structured Interviews ◽  
Sustainable Building ◽  
Governmental Institutions

Coconut palm wood is commonly regarded as a sustainable building material. Nonetheless, its adoption as a green building material by the construction industry is limited, particularly in West Africa. This paper analyses the impediments to the effective adoption of coconut palm wood in residential building construction. The research data was collected from literature reviews, expert-based surveys, and semi-structured interviews with specialists from the construction sector, African Timber Organization, governmental institutions related to forestry and construction, university professors, and researchers in the areas of sustainable building materials and construction. Thirteen crucial impediments were identified and an integrated evaluation of the impediments was conducted using the Interpretive Structural Modelling (ISM) technique to examine the hierarchical structure of the relations between the impediments. A further technique, Cross-impact Matrix Multiplication Applied to Classification (MICMAC), was used to categorize the impediments from a driving to driven perspective. This categorization provides a unique profile for the impediments, which is different from that of conventional evaluation techniques for evaluating impediments. The findings of this paper offer useful guide to practitioners and policy makers in formulating effective policies, regulations, and standards that will promote the development and wide adoption of coconut palm wood in the construction industry.

scholarly journals Embending Sustainability Dynamics in the Lean Construction Supply Chain Management

2016 ◽  
Vol 4 (1) ◽  
pp. 60-78 ◽  
Author(s):  
Begum Sertyesilisik
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Construction Industry ◽  
Value Added ◽  
Lean Construction ◽  
Construction Project Management ◽  
Construction Process ◽  
Environmental Footprint ◽  
Sustainable Building ◽  
Chain Management

AbstractThe world’s habitat is being deteriorated despite of the precautions taken. Construction industry is among the industries which highly effect the environment adversely not only through its outputs but also through the construction process and its inputs. The main focus in dealing with the reduction of its footprint has been on sustainable building certificates which mainly analyse the output of the construction activies. There is need to analyse the construction supply chain as a whole and to embed sustainability dynamics in construction supply chain management. Lean construction project management contributes to the reduction of the environmental footprint of the construction industry, enabling reduction in waste, and increasing value added activities. For this reason, based on an in depth literature review, this paper analyses and establishes the principles of the integration of the sustainability dynamics into lean construction supply chain management.

scholarly journals Application of Hybrid SWARA–BIM in Reducing Reworks of Building Construction Projects from the Perspective of Time

2020 ◽  
Vol 12 (21) ◽  
pp. 8927
Author(s):  
Hamidreza Khalesi ◽  
Amirhossein Balali ◽  
Alireza Valipour ◽  
Jurgita Antucheviciene ◽  
Darius Migilinskas ◽  
...  
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Residential Buildings ◽  
Working Hours ◽  
Building Construction ◽  
Value Management ◽  
Earned Value ◽  
Sustainable Building ◽  
System A ◽  
Building Information

One of the major issues of the construction industry has been the “reworks” that affect the time, quality, and cost of projects. Therefore, reworks and the ineffective use of site resources and materials will always result in significant losses on projects. The development of information technology has led to the widespread use of Building Information Modelling (BIM) to enhance the delivery of more sustainable building construction projects. The purpose of this study is to combine the Step-wise Weight Assessment Ratio Analysis (SWARA) method and BIM technologies to identify and reduce time delays caused by reworks in construction projects. Firstly, 49 rework causes in residential buildings were identified and ranked. Then, BIM was generated and compared to the initial model. It was observed that working hours were reduced by 4.6%. Moreover, using an Earned Value Management (EVM) system, a 0.06 increase in Schedule Performance Index (SPI) factor was illustrated. Results obtained by this study provide an effective step in reducing a project’s time in the construction industry.

scholarly journals APLIKASI LEAN CONSTRUCTION UNTUK MENGIDENTIFIKASI PEMBOROSAN PADA PROSES LOGISTIK PROYEK

2015 ◽  
Author(s):  
Sri Sugiantari ◽  
I G. A. Adnyana Putera ◽  
Gd. Astawa Diputra
Keyword(s):  
Material Selection ◽  
Value Added ◽  
Project Completion ◽  
Value Stream ◽  
Internal Customers ◽  
A Value ◽  
Distribution Process ◽  
Material Transportation ◽  
Logistics Process

Construction logistics process hides some non value added activities which are difficult to avoid, those activities have extended leading time which are not only cause the delay of the project completion, but also spend more production expenses that effect to the profit itself. Data rising by questionnaire is conducted in 22 qualified contractors around Denpasar with 3 respondents in each contractor. Data raising by questionnaire is done in 2 stages, first stage is questionnaire which identify wastes. Second stage are questionnaire which determine waste causes. Field observation is aimed to create a value steam mapping of construction logistic process. It had been found 7 types of wasting which often occurs. They are the field inspection, the purchase of one type material in different suppliers, awaiting the instruction of the owner, the delay of the material transportation, the purpose of approval or additional signature, clarification needs, awaiting the instruction of the superior. Afterwards, the cause of each wasting, namely the workers inspected are less skilled, the bad quality of goods given by the suppliers, the owner procedures which require workers await the instruction before working, material loading-unloading and distribution process is too slow, a complicated bureaucratic system and unclear information. And from the observation, it is obtained that there are some non-added activities occurred throughout the value stream of the construction project logistics, among them awaiting the approval of the supervisors, transportation, awaiting the order process which is still done manually and product defects during the material selection. As a wasting reduction, it is necessary to simplify the process, create a standard operation procedure, provide enough training to the workers so they are more independent, use an information technology to ease the delivery of the report, hold a long-term contracts with the suppliers and the internal customers.

scholarly journals Value Added Tax in Nepalese Context

NUTA Journal ◽  
2018 ◽  
Vol 5 (1-2) ◽  
pp. 87-94
Author(s):  
Dilnath Dangal
Keyword(s):  
Value Added ◽  
Secondary Data ◽  
Vital Role ◽  
Sales Tax ◽  
Fiscal Year ◽  
Tax Revenue ◽  
Total Revenue ◽  
Value Added Tax ◽  
Potential Yield ◽  
A Value

A value added tax (VAT) is a tax not on the total value of the commodity being sold, but on the value added by the last trader. Developing countries are engaging in the study of VAT more seriously as it is the source of tax revenue which has high tax potential yield among the existing tax systems. In this situation, this paper intended to assess practices of VAT and VAT administration as well as its contribution on GDP in Nepalese context. More so, the study collected secondary data which are analyzed based on descriptive/comparative methods. The study found that, sales tax has been replaced by VAT since 1997 in Nepal. Before that sales tax played a vital role to collect revenue and resources mobilization. Department of VAT and its field offices were/are responsible for administering VAT functions that was/is not yet attractive and efficient. However, data shows that collecting VAT is in increasing order. In Fiscal Year 2014/15 it came to NRs. 11516 crore which was 5.42 percent of GDP, 29.60 percent of total revenue and 48.14 percent of indirect tax revenue. And the contribution of VAT as percent of GDP remained at average of 4.04 percent during the study period (2002/2003 to 2014/2015).

Microgeneration Based on Renewable Energy in Sustainable Building

2014 ◽  
Vol 1020 ◽  
pp. 495-500
Author(s):  
Lucjan Kurzak
Keyword(s):  
Renewable Energy ◽  
Greenhouse Gas ◽  
Construction Industry ◽  
General Principle ◽  
Energy Production ◽  
Principal Part ◽  
Sustainable Growth ◽  
Building Construction ◽  
Sustainable Building ◽  
World Energy

This paper focuses on the present and prospective use of renewable energy in sustainable building. Construction industry, which consumes over 40% of world energy production and generates nearly 35% of world greenhouse gas emissions, bears responsibility for preservation of environment. The principal part of this publication discusses renewable energy as an inexhaustible and ecological source, which conforms to the general principle of sustainable growth.

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