Rubblestone is one of the most ancient building materials. One copy can weigh up to 40 kg and up to 50 cm in size. It happens in the form of large pieces of irregular shape, yellowish or green-gray in color. The source of extraction of this material is the territory of limestones, sandstones, dolomites, shell rocks, other igneous and metamorphic rocks. Very rarely it is mined from granite.
Three types of buta
There are three types of stone. Torn - it is obtained as a result of blasting. Bedous - it is broken out of layered rocks. Plitnyakovy - it is mined from metamorphic and sedimentary rocks that have a shale structure. Plitnyakovy rubble stone has the form of a plate, however, very uneven. The same can be said about the bedded rubble stone. These plates, despite their unevenness, have the same qualities as the torn look. But they are more convenient to use during construction, since they almost do not require additional costs for masonry. Whereas in addition to torn buta, other materials are required. To fill the voids formed during masonry, small pebbles and mortar are needed. Despite the fact thatrubble stone is mined by blasting, certain requirements apply to it. The structure must be homogeneous, free of clay and loose rocks, not cracked or delaminated.
Key Features
Very durable stone. Its strength depends on where it was mined: from light rocks, heavy sedimentary or igneous. Depending on this, the strength is measured in the range from 2 to 30 MPa. Another of the excellent properties of this stone is frost resistance. It should be at least 15 cycles. This means that the rubble stone was frozen and thawed at least 15 times and did not crumble and delaminate, did not lose more than 5% in weight, and it can be used in construction. When struck with a hammer, the stone should make a ringing sound. This speaks of its high quality. Conversely, a dull sound means a large amount of impurities of clay and other rocks. Such a bottle is easy to break with one blow of a hammer (weighing 1 kg), and it will crumble into rubble. Therefore, substandard material is processed into crushed stone. For rubble concrete masonry, rubble stone is used, the price of which is significantly lower than the price of the same material intended for cladding.
Construction applications
The stone is well suited for laying the foundation of monumental buildings, hydrotechnical and other engineering facilities. Rubble masonry is also used for the construction of sumps, tanks, sewers and buildings that are notwill be heated. In this case, the weight of the stone should not exceed 30 kg. Very large stones are pre-split with a sledgehammer into pieces of suitable size. A small fence can be laid out with a dry masonry boot. No bonding solution is used here. For higher construction, a bonding solution is needed. This is one of the most worthy building materials. Its price varies from 1,500 to 20,000 rubles per ton. Documents are issued for each batch, which indicate the original breed, size of pieces, frost resistance and strength grades.
