Utilization of Agroresidual Waste in Effective Blending in Portland Cement

Abstract

Indigenous resources for natural and artificial mineral admixtures with high pozzolanic reactivity have been employed in many countries around the world. Extensive studies have been conducted for this purpose. With the use of agricultural waste residue, apart from improving properties of concrete, main benefits come from saving natural resources and energy, as well as protecting the environment by using these mineral admixtures (agroagricultural waste). The effective level of blending Portland cement (PC) in mortar or concrete with such mineral admixtures depends on many factors, such as the type of admixture and the cement replacement level. In the present paper two types of agroagricultural waste residue, namely, rice husk ash, bagasse ash and byproduct from thermal waste and fly ash were used. The above mentioned admixtures were thermally treated at a temperature of 650∘C. Characterizations of mineral admixtures were carried out by FTIR and XRD, and Microstructural properties were evaluated in concrete and mortar with partially replacement levels varying from 5% to 30%. Various tests such as water absorption, bulk volume of the specimen, dry weight of the specimen saturated mass, and coefficient of water absorption were concluded. The results showed that as the percentage of replacement level increases in the entire three admixtures studied, water absorption also increased.

A Study on Mechanical Behaviour of Surface Modified Rice Husk/Polypropylene Composite Using Sodium Hydroxide

“…It happened because when filler loading increase the effective matrix cross section reduction and stress concentration increase. It is similar finding [12,13,14,15,16,17,18,19,20,21] where the less percentage of matrix cannot reinforced well with natural fiber and it make facture if stress is applied and easy to slip off. Although the boiled & NaOH treated rice husk strength decreased when the percentage of rice husk composite increase but it is still improve when compared with untreated or boiled rice husk.…”

“…Thus, rice husk concrete can be successfully used as light weight concrete for the manufacture of structures where the weight of structure is of ultimate importance. [9]- [12].…”

Sheep Dung Ash as a Low-Cost Adsorbent for the Reduction of COD of Highly Polluted Oilfield-Produced Water

“…The broad peak at 3433 cm −1 is related to the stretching vibration of the water OH group. The band at 1610 cm −1 is associated with the deformation vibration of the H-O-H group from the adsorbed water molecules [11][12][13]. The absorption bands at 1098, 798, and 470 cm −1 are assigned to the asymmetric Si-O-Si stretch, the symmetric Si-O-Si stretch, and Si-O-Si deformation, respectively [14].…”

Properties of Sawdust Concrete

“…In their work, they observed that the compressive strength of the concrete produced increased with increase in curing age and decreased with increase in percentage replacement of OPC with each ash. Parande, Stalin, Thangarajan, and Karthikeyan [14] used a mixture of rice husk ash, bagasse ash, fly ash and bye product from thermal waste to partially replace cement in concrete from 5% to 30%. In their work, they observed that as the percentage replacement level increased, the water absorption of the concrete increased.…”