PERFORMANCE EVALUATION OF CONCRETE CONTAINING CASSAVA PEEL AS SUPPLEMENTARY CEMENTITIOUS MATERIAL (SCM) ASH AND BAMBOO AS REINFORCEMENT

The major materials utilized in construction activities is reinforced concrete which contains steel and cement. Emission of carbon-dioxide and the depletion of the air quality index can be attributed to the production of cement and steel. There is limited information on the performance of concrete containing cassava peel ash (CPA) and bamboo as most work has always been on concrete and steel. Therefore, this research aims to evaluate the performance of concrete containing cassava peel ash (CPA) and bamboo One hundred and seventy-four samples of beams and cubes were produced from twentynine experimental runs of bamboo reinforced concrete (BRC) containing CPA. Four variables namely CPA content, bamboo size, beam length and beam depth were used to evaluate the compressive strength, flexural strength and flexural strain of the CPA and BRC. The addition of the CPA varied from 0 to 20 % while the bamboo size varied from 12 to 16 mm. The beam length varied from 400 to 600 mm while the depth of bamboo beam varied from 150 to 250 mm respectively. Data was analyzed using descriptive statistics and Response Surface Methodology (RSM) The CPA and compressive strength values for the concrete were 0, 10, 20 % and 23.4, 22.2, 21.4 N/mm2 respectively. The values obtained for the flexural strength of concrete were 6, 10 and 12 N/mm2 for bamboo sizes of 12, 14, and 16 mm respectively. The values for the flexural strain for CPA of 0, 10, 20 % were1.0, 0.5 and 0.0 % respectively. The results obtained ranged from 307.9, 322.0 and 393.3 N/mm2 for 12, 14 and 16 mm respectively for tensile strength of bamboo. The concrete mix met the requirement for grade 20 which is used in most cases for structural concrete work. The bamboo size and length of the beam also affected the performance of bamboo reinforced concrete positively. The CPA values were inversely proportional to the compressive strength values. It is therefore recommended that casava peel ash should be used as replacement for cement up to 20 % while bamboo can be used as a replacement for steel in structural elements such as beams, columns and slabs

Recycling of polyethylene terephthalate (PET) plastic bottle wastes in bituminous asphaltic concrete

This research sheds light on the concept of eco-friendly road construction which comprises eco-design, eco-extraction, eco-manufacturing, eco-construction, eco-rehabilitation, eco-maintenance, eco-demolition, and socioeconomic empowerment. It also revealed the challenges being faced in its adoption and the benefits derivable from its application. Furthermore, the effects of recycling PET plastic bottle wastes produced in North Central Nigeria in bituminous asphaltic concrete (BAC) used in flexible pavement construction were also evaluated. The mix design consists of 60/70 penetration-grade asphaltic concrete (5%), 68% coarse aggregate, 6% fine aggregate, and 21% filler using the dry process at 170°C. The optimum bitumen content (OBC) for conventional BAC was obtained as 4% by weight of total aggregates and filler. Polymer-coated aggregate (PCA)-modified BAC seems preferable because it has the potential to utilize more plastic wastes with a higher optimum plastic content (OPC) of 16.7% by weight of total aggregates and filler compared to that of 9% by weight of OBC achieved by PMB-BAC. For both PMB- and PCA-modified BAC, an increase in air void, void in mineral aggregate, and Marshall stability were observed. Eco-friendly road construction which recycles PET wastes should be encouraged by government considering its potential environmental and economic benefits

Dataset of mechanical, marshall and rheological properties of crumb rubber – Bio-oil modified hot mix asphalt for sustainable pavement works

This data article presents information on the modification of bitumen with bio-oil pyrolyzed from cassava peels, and upgraded with a non-degradable polymer i.e. crumb rubber. Performance tests were carried out on the bio-oil crumb rubber modified bitumen. The main objective of bitumen modification is to produce new binders with improved mechanical, marshall and rheological properties [1]. The percentage of bio-oil by volume used for modification of bitumen was 5%, 10%, 15% and 20% respectively. Marshall Stability and flow tests were also carried out on the crumb rubber bio-asphalt produced