Lightweight Concrete with an Agricultural Waste – Buckwheat Husk

Abstract

This paper presents a parametric experimental study which investigates the potential use of buckwheat husk wastes (as an aggregate in concrete) and opoka combination for producing a lightweight composite. The study was carried out to investigate the influence of the buckwheat husk extract on the setting and hardening of pastes in which cement was partially replaced by 0, 33, or 50 % of natural pozzolana. The kinetics of hydration up to 48 h was studied using isothermal conduction calorimetry. Some of the physical and mechanical properties of buckwheat husk concrete with various levels of cement replacement of opoka without and with sand (part of buckwheat husk was replaced in the same volume of sand) were investigated. Experimental data on the compressive strength of concrete utilizing buckwheat husk with and without sand and cement at varying proportions are presented. The results suggest that buckwheat husk may be used as an aggregate, particularly in lightweight concrete, panel and blocks for walls at a relatively cheaper price.

The Impact of Fiber from Buckwheat Hulls Waste on the Pasting, Rheological and Textural Properties of Normal and Waxy Potato Starch Gels

“…The hulls of the buckwheat seeds that are produced during the de-hulling process are a waste material and are burned after harvest. In areas where buckwheat is cultivated, this is an environmental problem [ 10 ]. Recently, there has been increased interest in renewable by-products as promising raw materials that can be used in the production of a variety of food additives, chemicals, textiles, building materials, biotechnologies, and medicines because they are cheap and abundant agricultural bioproducts.…”

Investigation of Buckwheat Hulls as Additives in the Production of Solid Biomass Fuel from Straw

“…Lithuania ranks ninth among the largest buckwheat producers in the world [17] and provides particularly large quantities of buckwheat hulls. A large amount of buckwheat hulls is currently used in various industrial areas [18,19], and only a small part is used for thermal conversion processes [20]. However, judging from studies on the energetic properties of wood, wood pellets, and peat [21][22][23], buckwheat hulls have comparatively high energy potential [21].…”

A research of chemical nature and surface properties of plant disperse fillers

“…Thus, the results obtained provide more complete information about the acid-base properties of the surface of the investigated fillers, which in turn allows predicting and re gulating the interfacial interactions in disperse systems. Plant disperse waste is actively used to create composite materials, both in water-based concretes [4] and in organicbased polymers [1][2][3][4][5][6][7][12][13][14][15][16]. These wastes can also be used as adsorbents for removing contaminants from aqueous and organic liquid media [32][33][34][35][36].…”

“…The use of waste and processing products of the agricultural and woodworking industries is especial-ly relevant. Among them, disperse products of processing large-tonnage grain crops: rice [1−3], buckwheat [4][5][6][7][8][9][10][11][12], oat [9,10,13], wheat husk [13]. Products and waste of some crops: flax fiber [14], cotton [15] and sunflower stalks.…”