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Correction: González-Partida, E.; Camprubí, A.; Carrillo-Chávez, A.; Díaz-Carreño, E.H.; González-Ruiz, L.E.; Farfán-Panamá, J.L.; Cienfuegos-Alvarado, E.; Morales-Puente, P.; Vázquez-Ramírez, J.T. Giant Fluorite Mineralization in Central Mexico by Means of Exceptionally Low Salinity Fluids: An Unusual Style among MVT Deposits. Minerals 2019, 9, 35
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Influential Factors in Transportation and Mechanical Properties of Aeolian Sand-Based Cemented Filling Material
Open AccessArticle

Mechanical Characteristics and Failure Prediction of Cement Mortar with a Sandwich Structure

1
State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
2
School of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(3), 143; https://doi.org/10.3390/min9030143
Received: 28 January 2019 / Revised: 22 February 2019 / Accepted: 23 February 2019 / Published: 28 February 2019
(This article belongs to the Special Issue Backfilling Materials for Underground Mining)
It is necessary to master the mechanical properties and failure prediction of the composite of mortar and rock block in a mined-out area. In this study, uniaxial compression and acoustic emission (AE) synchronous tests of mortar specimens with different sandwich materials and cement–sand ratios were carried out. The results showed that the compressive strength and elastic modulus of mortar specimens increased with an increase in the cement–sand ratio and the stiffness of the sandwich material. The AE counts and energy of mortar specimens with a high-stiffness sandwich material were maximum when they were destroyed. The b value, a number that reflects the extent of fracture propagation, decreased first and then increased with the increase in strain. The inflection point of the b value can be taken as the indication of the imminent failure of the mortar. A method for determining the b value at the turning point was proposed and verified. View Full-Text
Keywords: mechanical characteristics; failure prediction; sandwich materials; cement mortar mechanical characteristics; failure prediction; sandwich materials; cement mortar
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Liu, X.; Gu, Q.; Tan, Y.; Ning, J.; Jia, Z. Mechanical Characteristics and Failure Prediction of Cement Mortar with a Sandwich Structure. Minerals 2019, 9, 143.

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