Ahmet Filazi, Nesrin Kurtoğlu, Fatih Kural

The Production of Rice Husk Ash and Blast Furnace Slag-Based Alkali-Activated Composites under High-Temperature Effects

Introduction

The production of rice husk ash and blast furnace slag-based alkali-activated composites under high-temperature effects. Investigate sustainable alkali-activated composites from rice husk ash & blast furnace slag. Evaluate their strength & fire resistance under high temperatures for eco-friendly construction.

Abstract

Alkali-activated concretes offer several advantages over conventional Portland cement-based concretes, including environmental sustainability, cost-effectiveness, and improved permeability. The use of alkali-activated concretes, as a replacement for Portland cement, provides significant environmental benefits, such as reducing carbon dioxide emissions by up to 80%, and facilitates the recycling and reuse of industrial and agricultural by-products. This study focuses on the development of alkali-activated concrete by incorporating industrial by-products like blast furnace slag and rice husk ash. A mixture of alkali-activated concrete based on blast furnace slag will be prepared, with partial substitution of Portland cement by these by-products by weight. The study will investigate the effects of these substitutions on the flexural and compressive strengths of the concrete over periods of 7, 28, and 90 days, as well as its fire resistance at temperatures of 200, 400, 600, and 800°C. The aim of this research is to contribute to the advancement of alkali-activated concrete technology, promoting the use of industrial by-products in the creation of more sustainable and environmentally-friendly construction materials.

Review

The submitted abstract, "The Production of Rice Husk Ash and Blast Furnace Slag-Based Alkali-Activated Composites under High-Temperature Effects," introduces a highly relevant and timely research topic. The focus on alkali-activated materials (AAMs) as sustainable alternatives to Portland cement, coupled with the effective utilization of industrial and agricultural by-products like blast furnace slag and rice husk ash, aligns perfectly with contemporary global efforts toward environmental sustainability and waste valorization. Investigating the performance of these novel composites under high-temperature conditions is particularly crucial, as it addresses a significant gap in current knowledge regarding their practical application, durability, and safety in fire-prone environments. The proposed methodology appears comprehensive and well-structured, aiming to provide a thorough evaluation of the developed alkali-activated concrete. The study plans to systematically assess the impact of partial substitution of Portland cement on both flexural and compressive strengths over three practical curing durations (7, 28, and 90 days). Critically, the research extends to a detailed investigation of fire resistance across a range of elevated temperatures (200, 400, 600, and 800°C). This dual focus on long-term strength development and high-temperature durability is essential for establishing the viability and reliability of these new construction materials for widespread adoption. This research holds significant potential to advance the field of sustainable construction materials by providing robust data on the engineering performance of alkali-activated composites incorporating waste streams. By rigorously testing critical properties under conditions relevant to real-world structural applications, including exposure to fire, the study promises to offer valuable insights for industry and academia. The findings are expected to contribute substantially to the promotion of more environmentally friendly and resilient construction technologies, enhancing the confidence in deploying alkali-activated concretes as a credible alternative to conventional cement-based systems, especially where high-temperature performance is a key consideration.

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