Supplementary cementitious materials: New sources, characterization, and performance insights

The past and future of sustainable concrete: A critical review and new strategies on cement-based materials

Recycling of seashell waste in concrete: A review

Green concrete production incorporating waste carpet fiber and palm oil fuel ash

Environmental concerns related to the disposal of various waste materials have escalated to a worrying level. Depending on the local industries, different types of waste are generated in huge quantities every year. Hence, the demand for more sustainable development has further increased the importance of green construction. In recent years, extensive study efforts have been made to recycle wastes for possible use in the production of concrete products. This is because concrete blocks seem to be the most popular option for the incorporation of recycled waste materials due to the lower quality requirements of materials. This paper reviews published research works on the use of various kinds of wastes (i.e. recycled concrete, crushed brick, soda lime glass, cathode ray tube glass, crumb rubber, ceramic and tile waste, etc.) in the production of concrete blocks. The common concrete block properties as well as the value-added properties of concrete blocks with incorporated waste materials are highlighted and discussed in this paper. Several unique characteristics of recycled crumb rubber, plastic waste and crushed brick enhance the fire resistance, toughness, functional and insulation properties of concrete blocks. Also, the quantity of these materials incorporated into concrete blocks can be maximized up to 100% as natural aggregate replacements, while their usage can also be limited to below 30% in certain applications in order to meet the standard requirements of concrete blocks. The compliance of concrete blocks with standard requirements and the value-added properties have demonstrated good potential for incorporating wastes as aggregate in concrete blocks.

Recycling of wastes for value-added applications in concrete blocks: An overview

Green concrete partially comprised of farming waste residues: a review

Selection of meteorological parameters affecting rainfall estimation using neuro-fuzzy computing methodology

Threats to beaches have accelerated the coastal destruction. In recent decades, geotextile tubes were used around the world to prevent coastal erosion, to encourage beach nourishment, and to assist mangrove rehabilitation. However, the applications of geotextile tube in sandy and muddy coasts have different concerns as the geological settings are different. Applications of geotextile tubes in sandy beaches were mainly to prevent coastline from further erosion and to nourish the beach. However, for the muddy coasts, mangrove rehabilitation and conservation were additional concerns in coastal management schemes. The mangrove forests are natural barriers which can be found on the muddy coasts of many tropical countries. In this paper, the viability of geotextile tubes in sandy and muddy beaches was analysed. The advantages and disadvantages of the utilization of geotextile tubes in coastal management were discussed based on the experiences from the tropical countries such as Mexico, Malaysia, and Thailand. From the case studies, impressive improvements in coastal restoration after installation of geotextile tubes were shown. Based on the discussion, several recommendations to improve the application of geotextile tubes were suggested in this paper.

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Utilization of geotextile tube for sandy and muddy coastal management: a review.

The use of geotubes is now common in coastline protection due to notable advantages such as erosion prevention, competitive cost and speedy installation procedures. Previous researchers have presented analytical, empirical and numerical approaches for geotube design. However, design approach for geotube which functions as breakwater on deformable muddy foundation and subjected to hydrodynamic loads has not been well reported. Hence, this study evaluates the behavior of geotube breakwaters installed on a deformable muddy foundation based on field measurements and numerical analysis. The field measurements were carried out on quarter-yearly basis to assess the behavior of geotube under hydrodynamic forces. Two-dimensional finite element analysis was performed to simulate the deformation and the displacement of geotube breakwater subjected to hydrodynamic loads, taking into account of deformable foundation condition. The structural stability and structure’s height reduction due to foundation settlement are essential considerations in breakwater design. The agreements between field monitoring and numerical results were promising; therefore, the finite element models can be used to predict the behavior of geotube on those muddy coast areas with similar hydrodynamic and geological conditions.

Siew Cheng Lee

Papers

Green concrete partially comprised of farming waste residues: a review

Recycling of seashell waste in concrete: A review

Selection of meteorological parameters affecting rainfall estimation using neuro-fuzzy computing methodology

Utilization of geotextile tube for sandy and muddy coastal management: a review.

The Evaluation of Geotube Behaviors on Muddy Beach: Field Monitoring and Numerical Analysis