Effect of magnesium silicate filler on mechanical characteristics of concrete

Development of the mineral mining sector should rely on the environmental safety, and utilization of mining waste becomes a relevant target in this regard. To this effect, the most promising and economically validated area is production of concrete. It is possible to utilize much overburden, dead and poor quality rocks in this case. Such rocks also include magnesium silicate rocks of different mineralogy and chemistry, utilizable as a coarse filler. This research aims to analyze the main characteristics of crushed stone made of magnesium silicate rocks and their effects on mechanical characteristics of concrete. It is found that this-type crushed stone has the main physical and mechanical properties conformable with the engineering standards and can be used in construction. The type of crushed stone influences the strength of concrete. The highest strength is demonstrated by concrete with dunite filler, the lowest strength is a feature of serpentine filler. The compressive strength of concrete with basalt filler is comparable with the compressive strength of concrete with granite filler. This is governed by the shape and hardness of the filler grains. Dunite filler has cubic grains, and serpentine and basalt fillers have plate and needle grains. Dunite has a higher hardness than basalt and serpentine. Magnesium silicate rocks can also be used as a coarse filler in manufacture of concrete. This can extend the list of raw materials applicable in the construction industry, and can mitigate the adverse environmental effect of dumping owing to its reduction.

L.I. Khudyakova, I.Yu. Kotova Effect of magnesium silicate filler on mechanical characteristics of concrete. MIAB. Mining Inf. Anal. Bull. 2023;(7):88-95. [In Russ]. DOI: 10.25018/0236_1493_2023_7_0_88.

The work was carried out within the framework of the state task of the BIP SB RAS, No. AAAA 21-121011890003-4 using instruments and equipment of the Center for Collective Use.

L.I. Khudyakova¹, Dr. Sci. (Eng.), e-mail: lkhud@binm.ru, ORCID ID: 0000-0003-1423-410X,
I.Yu. Kotova¹, Cand. Sci. (Chem.), e-mail: ikotova@binm.ru,
¹ Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences (BINM SB RAS), 670047, Ulan-Ude, Russia.

L.I. Khudyakova, e-mail: lkhud@binm.ru.

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