Wear Resistance of Coarse Aggregate Based on Abrasion Characteristics and Mineral Composition

doi:10.16552/j.cnki.issn1001-1625.2025.0979

Abstract

Abstract:

In order to reveal the surface abrasion mechanism of rock aggregate from the mesoscopic scale， the chemical composition and mineral characteristics of basalt， granite， limestone and bauxite were analysed by XRF and XRD. Subsequently， the Taribolab test was used to test the friction and abrasion of various types of coarse aggregates， and the quantitative characterisation of the abrasion process was realised by combining the three-dimensional reconstruction of white light interference. Ultimately， the equivalent Mohs hardness H_EMH and aggregate hardness parameter H_AHP were utilised as the macroscopic mechanical strength indexes of aggregate post-mineral homogenisation. In addition， prediction models of aggregate wear resistance were established based on H_EMH and H_AHP， respectively. The results demonstrate that the friction coefficient of basalt， granite and bauxite increases rapidly and then stabilises during the abrasion test. The increasing period of limestone friction coefficient is slightly delayed. Finally， the stable value from highest to lowest， is as follows： limestone， granite， basalt and bauxite. A systematic comparison was made of wear resistance evaluation indexes， including the maximum abrasion depth， abrasion volume， abrasion quality and abrasion rate of the four types of aggregates， based on the morphological characteristics of the abrasion area. It was proposed that the abrasion rate should be used as the preferred index to characterize the wear resistance of the aggregate. Concurrently， the prediction models reveal that the accuracy of the model established solely by H_EMH and H_AHP are below 0.92. In consideration of the adhesion effect in the wear process， the friction coefficient is introduced to rectify the fitting results of the prediction model. Following the implementation of the correction， there is a substantial enhancement in the fitting coefficient of the hardness index and the abrasion rate， which reaches a value greater than 0.97.

Key words: coarse aggregate, abrasion mechanism, friction and abrasion test, three-dimensional reconstruction, abrasion rate, mineral composition, prediction model

CLC Number:

U416

CHEN Geng, LI Xiaolong, HOU Jianwei, JIA Jingpeng. Wear Resistance of Coarse Aggregate Based on Abrasion Characteristics and Mineral Composition[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(4): 1471-1482.

Figures/Tables 16

References 20

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Testing item	Testing result				Testing method
Testing item	Basalt	Granite	Limestone	Bauxite	Testing method
Particle size/mm	4.75~9.50	4.75~9.50	4.75~9.50	4.75~9.50	T 0302—2024
Crush value/%	13.7	14.4	20.5	10.8	T 0316—2024
Firmness value/%	2.8	3.1	5.0	2.1	T 0314—2024
Apparent density/（g·cm^-3）	2.880	2.681	2.722	3.182	T 0304—2024
Los angeles abrasion value/%	15.8	17.2	22.4	9.5	T 0317—2024
Polishing value/BPN	52	46	43	60	T 0321—2024

Testing item	Testing result				Testing method
Testing item	Basalt	Granite	Limestone	Bauxite	Testing method
Particle size/mm	4.75~9.50	4.75~9.50	4.75~9.50	4.75~9.50	T 0302—2024
Crush value/%	13.7	14.4	20.5	10.8	T 0316—2024
Firmness value/%	2.8	3.1	5.0	2.1	T 0314—2024
Apparent density/（g·cm^-3）	2.880	2.681	2.722	3.182	T 0304—2024
Los angeles abrasion value/%	15.8	17.2	22.4	9.5	T 0317—2024
Polishing value/BPN	52	46	43	60	T 0321—2024

Aggregate type	SiO₂	Al₂O₃	CaO	MgO	Fe₂O₃	K₂O	Na₂O	TiO₂	MnO	P₂O₅	Misc.
Limstone	6.83	2.40	82.10	5.32	1.30	0.72	0.15	0.21	0.02	0.04	0.91
Granite	70.37	13.08	2.84	1.29	4.75	3.08	2.98	0.11	0.07	0.04	1.39
Basalt	47.92	15.77	9.80	1.52	12.80	1.41	3.26	3.28	0.17	0.06	4.01
Bauxite	9.52	87.50	0.17	0.15	0.55	0.40	0.01	1.25	0.01	0.20	0.24

Aggregate type	SiO₂	Al₂O₃	CaO	MgO	Fe₂O₃	K₂O	Na₂O	TiO₂	MnO	P₂O₅	Misc.
Limstone	6.83	2.40	82.10	5.32	1.30	0.72	0.15	0.21	0.02	0.04	0.91
Granite	70.37	13.08	2.84	1.29	4.75	3.08	2.98	0.11	0.07	0.04	1.39
Basalt	47.92	15.77	9.80	1.52	12.80	1.41	3.26	3.28	0.17	0.06	4.01
Bauxite	9.52	87.50	0.17	0.15	0.55	0.40	0.01	1.25	0.01	0.20	0.24

Aggregate type	W_v /mm³	W_m /g	W_R/（mm³·N^-1·m^-1）
Basalt	0.126	2.390×10^-4	6.584×10^-4
Granite	0.166	3.430×10^-4	8.688×10^-4
Limestone	0.438	1.263×10^-3	2.284×10^-3
Bauxite	0.024	7.646×10^-5	1.252×10^-4