An Overview of Waste Materials for Sustainable Road Construction

Untreated soil typically has low shear strength, swelling behavior, high compressibility and its characteristics were highly dependent on the environment. In general, such problematic soil will lead to severe damages in road construction industry such as bearing capacity failure, slope instability, and excessive settlement. Agricultural waste, construction waste, and municipal waste have recently gained considerable attention as a sustainable material in road construction application due to its availability, environmental friendly and low-cost materials. Therefore in this review, randomly distributed fiber reinforced soil and oriented distributed fiber reinforced soil will be extensively discussed based on the emerging trend. It further reviewed the feasibility of using waste materials as a reinforcement material for the road construction industry. The review also attempts to evaluate and compare the engineering properties of soil and sustainable materials in order to enhance soil performance as well as help to improve the environment affected by growing waste materials

Evaluation of soaked and unsoaked CBR values of reinforced-soil with coconut husk fibre (CHF)

Recently, soil reinforcement has received more attention due to sustainability, simplicity, and costeffectiveness. The research aimed was to evaluate the efficacy of coconut husk fibre (CHF) in improving the strength properties of laterite soils. A series of laboratory tests such as Atterberg limit test, specific gravity test and hydrometer test was carried out on raw soil. Physical tests were conducted on CHF including density, specific gravity test, and water absorption testing. Geotechnical properties of both unreinforced and reinforced soils were determined through the compaction test and soaked and unsoaked California bearing ratio (CBR) test. The reinforced-soil was prepared by mixing with different ratio of CHF of 0%, 0.25%, 0.50%, 0.75%, 1.00% and 1.50% by mass of dry soil. All unreinforced samples (control samples) are prepared with 0% of CHF. From this research, it had been identified that 0.75% of CHF has the highest CBR value of 27%

Soil reinforcement with synthetic and natural fibres: a review

Problematic soil is a common issue in construction activities, particularly when dealing with peat and clay soils of poor geotechnical properties. Such soils are non-homogeneous, and their properties vary greatly from place to place or, in some cases, even at one place. The growing development demand and insufficient suitable ground have forced the development to use problematic soil. It is therefore important that the soil properties are improved so that any construction thereon is stable and safe. Soil improvement methods are of several different kinds and ways, but the reinforcement of fibre-based approaches have recently gained increasing interest in the field of geotechnical engineering. This technique is currently used in six main areas worldwide, including pavement, road and railway embankment, foundation, slope, and bridge. The main focus of this paper is to examine the feasibility, potential and efficacy of different types of natural and/or synthetic fibres in soil reinforcement by critically reviewing past researches. The pros and cons of natural versus synthetic fibres will also be discussed

Soil reinforcement with synthetic and natural fibres: a review

Problematic soil is a common issue in construction activities, particularly when dealing with peat and clay soils of poor geotechnical properties. Such soils are non-homogeneous, and their properties vary greatly from place to place or, in some cases, even at one place. The growing development demand and insufficient suitable ground have forced the development to use problematic soil. It is therefore important that the soil properties are improved so that any construction thereon is stable and safe. Soil improvement methods are of several different kinds and ways, but the reinforcement of fibre-based approaches have recently gained increasing interest in the field of geotechnical engineering. This technique is currently used in six main areas worldwide, including pavement, road and railway embankment, foundation, slope, and bridge. The main focus of this paper is to examine the feasibility, potential and efficacy of different types of natural and/or synthetic fibres in soil reinforcement by critically reviewing past researches. The pros and cons of natural versus synthetic fibres will also be discussed

An overview of waste materials for sustainable road construction

Untreated soil typically has low shear strength, swelling behavior, high compressibility and its characteristics were highly dependent on the environment. In general, such problematic soil will lead to severe damages in road construction industry such as bearing capacity failure, slope instability, and excessive settlement. Agricultural waste, construction waste, and municipal waste have recently gained considerable attention as a sustainable material in road construction application due to its availability, environmental friendly and low-cost materials. Therefore in this review, randomly distributed fiber reinforced soil and oriented distributed fiber reinforced soil will be extensively discussed based on the emerging trend. It further reviewed the feasibility of using waste materials as a reinforcement material for the road construction industry. The review also attempts to evaluate and compare the engineering properties of soil and sustainable materials in order to enhance soil performance as well as help to improve the environment affected by growing waste materials

Experimental study on strength performance of soil reinforced with coconut fibre for PANCHOR–MUAR road

Laterite soil is a typical earthfill material used in road construction base and sub-base layers. Regrettably, such soil becomes soft and saturated under high water content and causes an unsatisfactory performance in withstanding loads from proposed structures. Recently, the use of fibres to improve the soil layer, thereby increasing its geotechnical properties, has been attracting worldwide attention. Therefore, the present study takes a holistic approach to utilise coconut fibre (CF) as sustainable fibre reinforcement to enhance the strength performance of local laterite soil at Panchor - Muar, Johor. It then is used as an earthfill material for construction work. This research focuses mainly on investigating the compaction parameters and bearing capacity of CF–laterite soil. Standard compaction test and California bearing ratio (CBR) test were performed on soil randomly included with three different CF proportions (0%, 0.5%, and 1.0%). Results indicate that the optimum moisture content increased and the maximum dry density decreased as the proportion of CF increased to 1.0%. The CBR value of the reinforced soil recorded a significant increase to 17.42% and 26.14% after being mixed with 0.5% and 1.0% CF proportions, compared with unreinforced soil (7.58%). The coconut fibrereinforcement makes the stabilised soil ideal as a subbase material for road pavement applications. In addition to enhancing soil strength efficiency, CF reuse would also reduce the amount of agricultural waste disposal to landfills and prevent environmental problems