Application of Corn Stalk Ash as Partial Replacement for Cement in the Production of Interlocking Paving Stones

Abstract

In an attempt to reuse and convert agro wastes into useful materials for the construction industry, this research considered the application of corn stalk ash (CSA) as partial replacement for ordinary Portland cement (OPC) in the production of interlocking paving stones. The study investigated the oxide composition of CSA to ascertain its suitability as a pozzolanic material. Some properties of paving stones with CSA as a replacement for OPC were examined. The results showed that CSA is a good pozzolana having satisfied the required standards. The compressive strength of the specimens with replacement levels ranging from 5 to 25% cured for periods of 3–56 days was lower at early curing time but improved significantly at later age. 10% replacement level showed increased strength compared to 0% CSA at 28 days curing period. Density decreased with increasing ash content, water absorption rate increased with increased CSA contents, while abrasion resistance increased with increasing amount of CSA substitutions. The test results revealed that CSA paving stones can attain higher strength than the conventional ones at longer curing periods, due to its pozzolanic reactions.

Controlling of CO2 emission in buildings: An overview

“…It could be observed from the table that SiO2 is the predominant content in RHA with values ranging from 82.14 to 91.15%. The high silica content and its fineness, which is greater than that of cement makes it one of the widely used SCM confirms that RHA can be classified as a pozzolan having the percentages of SiO2 þ Al2O3 þ Fe2O3 above 70% as specified in ASTM C 618 [13]. As determined by Ganesan et al [8], the mean grain size (MGS), average specific surface area (SSA), bulk density (BD), specific gravity (SG) and loss on ignition (LOI) of RHA are 3.80 μm, 36.47 m2 /g, 0.40 g/cm3, 2.06 and 2.10%, respectively.…”

“…Corn stalk is obtained from maize after harvesting dried corn hub from the stand (See Fig 1). CSA is obtained by burning corn stalk at calcining temperature of 600 degree C for 7 h. In terms of chemical composition, CSA satisfies the combined chemical composition of silica, alumina and iron oxide above 70% [12] , which classifies it as a good pozzolan according to ASTM C 618 [13] . CSA was used to replace part of cement in the production of interlocking paving stones [12] .…”

Utilization of Nano-Grain Size Particles of Natural Perlite Rock in Blended Cement-Part II: Durability Against Sulfate Attack

“…The latter phases often cause expansion followed by internal minor cracks and the disintegration of the formed hydrates, which are the centers of binding or cementing properties. These are the main factors of the strength loss [2][3][4]16,19].…”

Significant Levels of Steel Slag Concrete Produced With Varying Water Cement Ratios

“…This lead to intrigue in the utilization of elective materials and exploration has been utilized on many exclusive substances as aggregate substitutes [6]. Adedokun et al [7] and Raheem et al [8][9][10] noted that the utilization of industrial and agricultural wastes are environmentally friendly method of disposing large of materials that would have constituted pollution to land, water and air. Steel slag are as of now being utilized in asphalt paving because of their firmness, mechanical energy, wear opposition, porosity and water retention potential.…”