Petrographic Evaluation of Aggregate from Igneous Rocks: Alkali–Silica Reaction Potential

Antolik, Aneta; Dąbrowski, Mariusz; Jóźwiak-Niedźwiedzka, Daria

doi:10.3390/min13081004

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…Igneous rocks, also known as magmatic rocks, are one of the three main types of rocks that make up the Earth's lithosphere. According to statistics, igneous rocks account for 66% of the entire crust volume and are widely distributed (Antolik et al, 2023). Relevant studies (Piasta et al, 2016;Qaidi et al, 2022;Dobiszewska et al, 2023) have shown that some igneous rocks have certain pozzolanic activity after being processed to a certain fineness, and their active components SiO 2 and Al 2 O 3 can hydrate with cement clinker to produce calcium hydroxide and high-alkaline hydrated calcium silicate, and high-quality low-alkaline hydrated calcium silicate and hydrated calcium aluminate.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of replacing part of cement by igneous rock powder as cementitious material: based on mortar macroscopic properties and microstructure

Li,

Zhao,

et al. 2024

Front. Mater.

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To address the increasing demand for cement and promote sustainable development, the utilization of igneous rock powder as a supplementary material to partially replace cement has emerged as an effective strategy. In this study, the fluidity and mechanical properties of the igneous rock powder-cement (IRP-OPC) composite system were investigated, and the hydration product and microstructure of IRP-OPC were analyzed by using TG/DSC, N2 adsorption-desorption curve (BET) and SEM. The experimental findings demonstrate that the performance of the andesite powder-cement composite cementing system (AP-OPC) surpasses that of tuff powder-cement slurry (TP-OPC) and granite powder-cement slurry (GP-OPC). When the dosage of andesite powder (AP) is 5%–15%, the flowability, flexural strength and compressive strength of cement mortar are improved. When the dosage is 10%, the 28-day compressive strength is 48.3 MPa. Under the condition of low content (10%), part of Ca(OH)2 is fully consumed by active SiO2 in AP and reacts to form C-S-H. Hydration products and AP particles with small particle size are filled into the structural gap, which refines the pore structure of cement slurry, and the increase in compactness provides support for the development of strength in the later stage. The use of 5%–15% AP instead of OPC can improve fluidity and meet the strength requirements of P.O 42.5 Portland cement. This substitution not only reduces engineering costs but also enhances resource utilization.

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Section: Introductionmentioning

confidence: 99%

Feasibility study of replacing part of cement by igneous rock powder as cementitious material: based on mortar macroscopic properties and microstructure

Li,

Zhao,

et al. 2024

Front. Mater.

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Initial Characteristics of Alkali–Silica Reaction Products in Mortar Containing Low-Purity Calcined Clay

Jóźwiak-Niedźwiedzka,

Jaskulski,

Dziedzic

et al. 2024

Materials

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An alkali–silica reaction (ASR) is a chemical process that leads to the formation of an expansive gel, potentially causing durability issues in concrete structures. This article investigates the properties and behaviour of ASR products in mortar with the addition of low-purity calcined clay as an additional material. This study includes an evaluation of the expansion and microstructural characteristics of the mortar, as well as an analysis of the formation and behaviour of ASR products with different contents of calcined clay. Expansion tests of the mortar beam specimens were conducted according to ASTM C1567, and a detailed microscopic analysis of the reaction products was performed. Additionally, their mechanical properties were determined using nanoindentation. This study reveals that with an increasing calcined clay content, the amount of the crystalline form of the ASR gel decreases, while the nanohardness increases. The Young’s modulus of the amorphous ASR products ranged from 5 to 12 GPa, while the nanohardness ranged from 0.41 to 0.67 GPa. The obtained results contribute to a better understanding of how the incorporation of low-purity calcined clay influences the ASR in mortar, providing valuable insights into developing sustainable and durable building materials for the construction industry.

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Petrographic Evaluation of Aggregate from Igneous Rocks: Alkali–Silica Reaction Potential

Cited by 2 publications

References 35 publications

Feasibility study of replacing part of cement by igneous rock powder as cementitious material: based on mortar macroscopic properties and microstructure

Feasibility study of replacing part of cement by igneous rock powder as cementitious material: based on mortar macroscopic properties and microstructure

Initial Characteristics of Alkali–Silica Reaction Products in Mortar Containing Low-Purity Calcined Clay

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