Investigation of the Effect of Addition Nano-papyrus Cane on the Mechanical Properties of Concrete

Abstract

This paper investigates the effect of nano-papyrus cane ash as an additive on concretes’ mechanical and physical properties. Three types of concrete mixtures, 1:2:4, 1:1.5:3, and 1:1:2 were prepared for each mixture, nano-papyrus ash was added in five different dosages of 0.75, 1.5, 3, 4.5, and 6% by weight of cement; therefore, eighteen mixes would be studied in this work. Physical properties represented by dry density and slump were also measured for each mix. Moreover, to evaluate the mechanical properties development split tensile strength and compressive strength were obtained at age (7 and 28). Results manifested that the adding of nano ash developed the compressive strength and split tensile strength of concrete and the maximum enhancement recognized in the mixes with a content of 4.5% nano-papyrus in each studied mixture in this work. The slump test results indicated that the workability of concrete increased with adding nano-papyrus ash gradually with increasing nanoparticles' content. As well as, dry density was significant increased with nano-papyrus ratio; greater values were recorded in mixtures with 1.5-4.5% content of nano-papyrus. When comparing the concrete mixes used, it was found that the best results were obtained with 1:1:2 mixtures. This remarkable improvement in concrete properties considers the nano-papyrus is considered a cement economical and useful replacement for traditional construction material. Doi: 10.28991/cej-2021-03091649 Full Text: PDF

Effect of Starch Powder on Behavior of Silica Fume Biopolymer Concrete

“…Table11 and Figure 2 demonstrate that the addition of Nano starch biopolymer by the weight of cement in silica fume concrete can increase the slump of concrete by 19% for 0.75%, while about 6% and 10% for 0.25% and 0.5% Nano starch in comparison to reference mix, improving the workability of concrete. This performance may be due to the high surface area of Nano starch in the mixture, which acts as a lubricant that tends to decrease the interior spirant between the atoms and aggregates, and consequently, the factor of compacting and the workability increases [25]. Another reason is that the main polymers of starch are amylose and amylopectin macromolecules with one hydrophobic and one hydrophilic end.…”

“…According to the findings of fresh density for silica fume concrete shown in Table XI and Figure 3, adding 0.75% Nano starch by weight of cement results in a 3% increase in fresh density, while adding 0.25% and 0.5% Nano starch results in a 1.9 % and 1.4% increase in fresh density, as compared to the standard mix. It may be because nanomaterials have a substantially higher surface area for absorbing water due to their small particle size [25]. Still, the addition of Nano starch was small, therefore there was a few increases in fresh density.…”

“…The nanomaterials are utilized to develop the cementations substances' durability, strength, and structural proficiency. In addition, the nanomaterial's utilization with cement can reduce the releases of (CO2) associated with concrete industry [2]. Over the last few decades, the development of environmentally friendly, high-performance, and renewable materials such as biopolymers has signaled a growing trend toward sustainable construction.…”

Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials

“…The introduction of fiber reinforcement and/or nanoparticles into cement composites is a common modification method, but fiber and ordinary nanomaterials cannot control the microstructure of the cement hydration products, and it is difficult to block harmful substances from penetration and to protect the reinforcement from corrosion. As a result, reinforcement corrosion may occur [ 10 , 11 , 12 ]. Permeability is one of the most important indexes of the durability of cement-based materials.…”

Mechanical Properties of Eco-friendly Concrete Made with Sugarcane Bagasse Ash

“…SCBA with good pozzolanic properties can be obtained when sugarcane bagasse is burned for 20 minutes at 800 to 1000°C [23,24] or burned by air calcination for 3 hours at 600 °C [25]. The silica percentage in the ash varies depending on some factors, such as temperature, the soil type used to farm sugarcane, and the method of burning [3,26]. This pozzolanic material can enhance concrete strength and durability when used as a mineral admixture for high-strength concrete [27].…”