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C Jayasinghe - One of the best experts on this subject based on the ideXlab platform.

  • cement stabilized rammed earth as a sustainable Construction Material
    Construction and Building Materials, 2016
    Co-Authors: K K G K D Kariyawasam, C Jayasinghe
    Abstract:

    Abstract In a world where the exploitation of natural resources by the Construction industry has become a severe problem, earth can represent an ideal building Material that has the potential to reduce the carbon footprint when a cradle to grave life cycle approach is considered. This can also ensure minimum damage to the environment since one day in future, earth obtained can be returned, but could be in a slightly modified form. However, it is very important to consider ways to eliminate the undesirable properties of soil and convert it to a strong and durable building Material that would be environmentally friendly. Stabilizing earth with cement and ramming at optimum moisture content forms cement stabilized rammed earth (CSRE), a building Material with sufficient strength and durability but low in embodied energy. This paper covers a detailed research carried out on CSRE to establish strength and durability properties together with applications in the form of pilot projects. Sandy laterite soil available in the tropical regions has been identified as a preferable ingredient for CSRE Construction which can offer adequate compressive and flexural strengths when cement content is in excess of 6%. Wet strength, erosion resistance and shrinkage properties were assessed and appropriate guidelines are proposed to ensure the durability of CSRE. Further, successful applications of CSRE are highlighted in different forms of Construction including housing, roads and retaining walls.

  • cement stabilized rammed earth as a sustainable Construction Material
    Construction and Building Materials, 2016
    Co-Authors: K K G K D Kariyawasam, C Jayasinghe
    Abstract:

    Abstract In a world where the exploitation of natural resources by the Construction industry has become a severe problem, earth can represent an ideal building Material that has the potential to reduce the carbon footprint when a cradle to grave life cycle approach is considered. This can also ensure minimum damage to the environment since one day in future, earth obtained can be returned, but could be in a slightly modified form. However, it is very important to consider ways to eliminate the undesirable properties of soil and convert it to a strong and durable building Material that would be environmentally friendly. Stabilizing earth with cement and ramming at optimum moisture content forms cement stabilized rammed earth (CSRE), a building Material with sufficient strength and durability but low in embodied energy. This paper covers a detailed research carried out on CSRE to establish strength and durability properties together with applications in the form of pilot projects. Sandy laterite soil available in the tropical regions has been identified as a preferable ingredient for CSRE Construction which can offer adequate compressive and flexural strengths when cement content is in excess of 6%. Wet strength, erosion resistance and shrinkage properties were assessed and appropriate guidelines are proposed to ensure the durability of CSRE. Further, successful applications of CSRE are highlighted in different forms of Construction including housing, roads and retaining walls.

K K G K D Kariyawasam - One of the best experts on this subject based on the ideXlab platform.

  • cement stabilized rammed earth as a sustainable Construction Material
    Construction and Building Materials, 2016
    Co-Authors: K K G K D Kariyawasam, C Jayasinghe
    Abstract:

    Abstract In a world where the exploitation of natural resources by the Construction industry has become a severe problem, earth can represent an ideal building Material that has the potential to reduce the carbon footprint when a cradle to grave life cycle approach is considered. This can also ensure minimum damage to the environment since one day in future, earth obtained can be returned, but could be in a slightly modified form. However, it is very important to consider ways to eliminate the undesirable properties of soil and convert it to a strong and durable building Material that would be environmentally friendly. Stabilizing earth with cement and ramming at optimum moisture content forms cement stabilized rammed earth (CSRE), a building Material with sufficient strength and durability but low in embodied energy. This paper covers a detailed research carried out on CSRE to establish strength and durability properties together with applications in the form of pilot projects. Sandy laterite soil available in the tropical regions has been identified as a preferable ingredient for CSRE Construction which can offer adequate compressive and flexural strengths when cement content is in excess of 6%. Wet strength, erosion resistance and shrinkage properties were assessed and appropriate guidelines are proposed to ensure the durability of CSRE. Further, successful applications of CSRE are highlighted in different forms of Construction including housing, roads and retaining walls.

  • cement stabilized rammed earth as a sustainable Construction Material
    Construction and Building Materials, 2016
    Co-Authors: K K G K D Kariyawasam, C Jayasinghe
    Abstract:

    Abstract In a world where the exploitation of natural resources by the Construction industry has become a severe problem, earth can represent an ideal building Material that has the potential to reduce the carbon footprint when a cradle to grave life cycle approach is considered. This can also ensure minimum damage to the environment since one day in future, earth obtained can be returned, but could be in a slightly modified form. However, it is very important to consider ways to eliminate the undesirable properties of soil and convert it to a strong and durable building Material that would be environmentally friendly. Stabilizing earth with cement and ramming at optimum moisture content forms cement stabilized rammed earth (CSRE), a building Material with sufficient strength and durability but low in embodied energy. This paper covers a detailed research carried out on CSRE to establish strength and durability properties together with applications in the form of pilot projects. Sandy laterite soil available in the tropical regions has been identified as a preferable ingredient for CSRE Construction which can offer adequate compressive and flexural strengths when cement content is in excess of 6%. Wet strength, erosion resistance and shrinkage properties were assessed and appropriate guidelines are proposed to ensure the durability of CSRE. Further, successful applications of CSRE are highlighted in different forms of Construction including housing, roads and retaining walls.

Sumit Chakraborty - One of the best experts on this subject based on the ideXlab platform.

  • effectiveness of sewage sludge ash combined with waste pozzolanic minerals in developing sustainable Construction Material an alternative approach for waste management
    Journal of Cleaner Production, 2017
    Co-Authors: Sumit Chakraborty, Byungwan Jo, Jun Ho Jo, Zafar Baloch
    Abstract:

    Abstract Utilization of the sewage sludge ash in fabricating the Construction Material would be an effective alternative approach under the sludge management scheme other than landfilling. The present investigation deals with the utilization of the recycled sewage sludge ash (SSA) combined with the quicklime (QL) and blast furnace slag (BFS) as a cementitious Material in controlling the physical and mechanical performances of mortar. The mortar samples were prepared using the different amount of SSA, QL, BFS, and alkali activator (AA). The performance of the sewage sludge ash based mortar (SAM) was evaluated measuring the bulk density, apparent porosity, compressive strength, flexural strength, and shrinkage strain, etc. The result reveals that the higher dose of AA (50% weight w.r.t the volume of water used) and QL (20% w.r.t. weight of the total cementitious Material) influences the mechanical strength of SAM. Additionally, the optimum dose of the BFS (10% w.r.t. weight of the total cementitious Material) leads to yield a maximum compressive strength (31.3 MPa) of SAM. Finally, based on the analytical analysis, a model has been proposed to explain the overall performance of the SAM. Hence, the utilization of SSA (70%) combined with QL (20%) and BFS (10%) for the fabrication of mortar and concrete is assumed to be an effective alternative technique in developing sustainable Construction Material and waste management as well.

Suksun Horpibulsuk - One of the best experts on this subject based on the ideXlab platform.

  • recycled waste foundry sand as a sustainable subgrade fill and pipe bedding Construction Material engineering and environmental evaluation
    Sustainable Cities and Society, 2017
    Co-Authors: Arul Arulrajah, Ehsan Yaghoubi, Monzur Alam Imteaz, Suksun Horpibulsuk
    Abstract:

    Abstract Waste foundry sand (WFS) is the primary by-product of foundries. Due to metals present in WFS and negative public perception, this Material is commonly discarded to landfill as a waste Material. WFS can however be potentially reused as a Construction Material in civil engineering infrastructure projects. In order to use WFS in a sustainable manner, the engineering properties of this Material needs to be properly evaluated and assessed against local requirements. In this research, geotechnical and environmental tests were undertaken to evaluate the properties and viability of WFS for usage in civil engineering Construction projects. In addition, control tests were undertaken on recycled glass (RG), a well-accepted waste Material that has been successfully implemented in civil engineering applications, for benchmarking purposes. Geotechnical test results, including determination of maximum dry density (MDD) and optimum moisture content (OMC), California bearing ratio (CBR) and permeability, indicate that WFS can satisfactorily be used as fill Material in embankments and in pipe-bedding applications. Comparisons of the environmental test results such as chemical composition and leachate analysis, with the requirements of local authorities indicated no particular hazards in the implementation of this Material in applications such as road embankment fills and pipe-bedding. The carbon footprint savings through any potential reuse of WFS/RG was furthermore quantified.

  • strength development of recycled asphalt pavement fly ash geopolymer as a road Construction Material
    Construction and Building Materials, 2016
    Co-Authors: Suksun Horpibulsuk, Arul Arulrajah
    Abstract:

    Abstract This paper investigates the strength development of Recycled Asphalt Pavement (RAP)-Fly Ash (FA) geopolymer as a road Construction Material. A mixture of sodium hydroxide solution (NaOH) and sodium silicate solution (Na2SiO3) is used as a liquid alkaline activator (L). Unconfined Compression Strength (UCS) is used as an indicator to measure the strength development of RAP-FA geopolymer and RAP-FA blend (without L). The UCS development is analyzed via Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD) analyses. Test results show that the compacted RAP-FA blend can be used as a base course Material as its UCS values meet the specified strength requirements. The UCS of RAP-FA blends increases with time due to the formation of Calcium Silicate Hydrate (C-S-H) and Calcium Aluminate Hydrate (C-A-H), as detected from XRD and SEM analyses. The UCS of RAP-FA geopolymer increases as the NaOH/Na2SiO3 ratio decreases and is higher than those of compacted RAP-FA blends. When the NaOH/Na2SiO3 ratios are less than 90:10. At an early stage of 7 days and room temperature curing, XRD and SEM analyses indicate that low geopolymerization products (N-A-S-H) in RAP-FA geopolymer are detected when only NaOH (NaOH/Na2SiO3 = 100:0) is used as L, hence the UCS of RAP-FA geopolymer at NaOH/Na2SiO3 = 100:0 is lower than that of RAP-FA blends. With increasing curing time and temperature, NaOH solution dissolves more silica and alumina from FA in the geopolymerization reaction, hence the UCS developed with time and temperature. The highly soluble silica from Na2SiO3 incorporates with leached silica and alumina from FA into a N-A-S-H gel which co-exists with C-S-H and C-A-H from RAP and FA reaction. Therefore, the 7-day UCS values of RAP-FA geopolymer increase with decreasing NaOH/Na2SiO3 ratios for both room temperature and 40 °C curing. This research study confirms the potential of RAP-FA blends and RAP-FA geopolymers as an alternative stabilized pavement Material.

Sachin A Mandavgane - One of the best experts on this subject based on the ideXlab platform.

  • development of sustainable Construction Material using industrial and agricultural solid waste a review of waste create bricks
    Construction and Building Materials, 2011
    Co-Authors: S P Raut, Rahul V Ralegaonkar, Sachin A Mandavgane
    Abstract:

    Accumulation of unmanaged industrial or agricultural solid waste especially in developing countries has resulted in an increased environmental concern. Recycling of such wastes as a sustainable Construction Material appears to be viable solution not only to pollution problem but also an economical option to design of green buildings. In view of utilization of industrial and agricultural waste Material for developing sustainable Construction Material, the present paper reviews various waste Materials in different compositions that were added to the raw Material at different levels to develop waste-create bricks (WCB). Various physico-mechanical and thermal properties of the bricks incorporating different waste Materials are reviewed and recommendations are suggested as the outcome of the study. The reviewed approach for the design and development of WCB using industrial solid waste is useful to provide a potential sustainable solution.