Abstract
The application of agricultural and aquaculture waste in concrete greatly reduces the pressure on the ecological environment brought by traditional concrete production. The use of agricultural and aquaculture wastes as cement replacement, aggregate replacement and fiber reinforcement has showed great potential. Making full use of these wastes can help the development of sustainable concrete. This paper provides an objective evaluation and summary of agricultural waste and aquaculture waste in green concrete. Agricultural waste is divided into natural plant fiber, agricultural waste ash and multi-application waste according to useful function and alternative methods, such as sisal fiber, olive waste ash, and bamboo. Aquaculture waste mainly refers to some shells such as oyster shell. This paper analyzes the advantages and disadvantages of agricultural and aquaculture waste concrete applications that have been reported and shows how different agricultural and aquaculture wastes are made in concrete. The selection of appropriate treatment methods and usage scenarios is extremely important for agricultural and aquaculture waste concrete, which can determine whether the concrete has reliable performance. This paper will lay a foundation for the progress of waste concrete and provide reliable help for the development of environmental protection concrete.
Highlights
Concrete is one of the most used building materials in the world
Most agricultural waste ash has the characteristics of volcanic ash, and can be used as the pozzolan material in mortar and concrete to achieve the expected effect, and in addition to improve the performance of mortar and concrete
With the increase of corncob ash content, more SiO2 can react with the lime produced during cement hydration, thereby producing more cementitious material, which helps to improve the compressive strength of the concrete (Adesanya and Raheem, 2009a)
Summary
Concrete is one of the most used building materials in the world. The global annual concrete consumption is close to 17.5 billion tons, in which the required aggregate and cement are about 13 billion tons and 2.6 billion tons, respectively (Bo et al, 2018). Compared to other natural plant fibers, jute fiber has a long continuous length, good processing technology, high strength and low elongation characteristics, Jute fiber can effectively enhance the compressive performance of concrete and has good crack resistance when the dosage is 0.9 kg/m3 and a certain length (40 mm in the test) (Zhang et al, 2012). Most agricultural waste ash has the characteristics of volcanic ash, and can be used as the pozzolan material in mortar and concrete to achieve the expected effect, and in addition to improve the performance of mortar and concrete.
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