As is well known,road paving needs to consider the characteristics of anti-skid,compressive,and frost resistance of the road surface.Therefore,the construction of roads requires relatively high building materials,and general stones cannot be used for road paving.Building roads requires basalt stones to have strong compressive,anti-corrosion,and anti-skid properties in order to ensure the safety and service life of the road.
The chemical composition of basalt stones is similar to that of gabbro,with SiO2 content ranging from 45%to 52%.The K2O+Na2O content is slightly higher than that of intrusive rocks,while the CaO,Fe2O3+FeO,and MgO contents are slightly lower than those of intrusive rocks.The mineral composition is mainly composed of basic feldspar and pyroxene,with minor minerals such as olivine,amphibole,and biotite.The rocks are dark in color,generally black,sometimes gray green,and dark purple.It has a spotted structure,with common stomatal and almond structures.
2.The bulk density of basalt stones is 2.8-3.3 g/cm3.The dense ones have a high compressive strength,which can reach up to 300 MPa,sometimes even higher.When there are glassy and porous materials,the strength decreases slightly.Basalt has high durability,many joints,and brittleness,making it difficult to obtain large blocks of stone.Due to the common occurrence of pores and almond structures,although basalt is widely distributed on the surface,it is not commonly used as decorative stone.
3.Basalt stones have excellent characteristics such as compressive strength,slip resistance,wear and corrosion resistance,low draft,strong adhesion to asphalt,and are not easily broken.After manual mechanical processing,the particles of basalt stones are uniform and the appearance is exquisite.They are widely used in the decoration of various outdoor places such as high-end building interior and exterior walls,municipal construction,ecological squares,parking lots,hotels,and homes.They are beautiful and practical,deeply loved by people,and are the best material for repairing roads,railways,and airport runways.In addition,based on its porous,wrinkled,and leaky characteristics,it can also be used to build rockeries in gardens or carved into small and exquisite bonsai.
The above is the explanation given by the editor about why road paving cannot do without basalt stones.I hope it is helpful to you!