the bricks are made of_________
Answers
Answer:
Normally, bricks contain the following ingredients: Silica (sand) – 50% to 60% by weight. Alumina (clay) – 20% to 30% by weight. Lime – 2 to 5% by weight.
Step-by-step explanation:
Bricks are among the oldest and most enduring of mankind’s building materials. Bricks are made by shaping a plastic mass of clay and water, which is then hardened by drying and firing. Until comparatively recent times the clay was dug, the bricks were made and the kilns set or drawn by manual labor with help from animal power. About 100 years ago, the first effective machines for brick production appeared, and the trend towards mechanization of clay winning, making and handling operations has continued at an increasing pace to the present day.
Brick is the simplest and most ancient of all building materials. Few other fabricated building units have enjoyed such widespread and continuous popularity. This enduring public acceptance is based on the unique combination of the proper ties offered by brick to the owner and builder. This single material can be used to enclose a structure with a decorative, load-bearing wall, which is exceptionally durable and, if properly constructed in the first place, requires practically no maintenance.
Because of the versatility of the raw material, which can readily be moulded into a great range of shapes and sizes, and the flexibility that this gives to design and construction, building in brick has remained cost-effective.
Secondary clay materials are compounds of alumina, silica with minor amounts of lime, magnesia, soda or potash. Iron compounds, usually the oxides, hydroxides or carbonates, are nearly always present as impurities in brick clays, and they account for most of the wide range of colours found in the finished product. Clays containing up to 3% of iron oxide give white to cream or buff colours, which change to pinks and reds as the iron oxide content rises to between 8 and 10%. By adding manganese dioxide in proportions from 1 to 4%, a range of grey and brown colours can be produced
Answer:
ground clay ,and water hope it helps u dear