Introduction
Autoclaved aerated concrete Blocks made of high quality silica sand, lime stone powder and natural organic additive can be widely used in drainage, pavement and other fields. It is a kind of new building material with good autoclavability, elasticity and plasticity. it has very good waterproof effect, excellent mechanical property(high compressive strength)and nice outlook etc. its production line includes vibrating feeder, jaw crusher, vertical mixer, pre-drying machine , autoclave rotary kiln, cooling belt conveyor.
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Advantages of AAC block over other types
Autoclaved Aerated Concrete Block (AAC) has been in use for over 70 years and is popular in many countries. These blocks can be used as a substitute for masonry construction where high levels of insulation are required such as storage buildings, animal sheds and foundations.
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AAC uses up to 35% less energy than other forms of construction due to its better insulation value, thermal mass capabilities and weight reduction when compared to traditional building methods such as brick or block.
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In addition AAC is noncombustible therefore it doesn’t have any worries if it ever caught on fire like timber or brick/block would have! It will remain intact without being effected at all unless exposed to extreme temperatures exceeding 1000 degrees Celsius. All these benefits make autoclaved aerated concrete block an ideal material for cold regions and wet environments. In fact there has never been another type of wall system that comes close to offering all these advantages combined into one product!
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Manufacturing Process of AAC Blocks from Silica Sand & Lime Stone Powder
There are two manufacturing processes in AAC blocks production; wet process and dry process. Wet process mainly takes place in ready-mix concrete plants. Construction aggregates (sand, crushed stone, gravel etc.) are used as base materials for a stable and strong raw mix which will later be processed into AAC blocks. Base materials can be recycled material such as concrete that is used in construction or demolished structures. Recycled materials have been proven to be environmentally friendly, cheaper than natural sand and durable.
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The lime content of typical lime concrete is 10% -15%. After being mixed with water and other additives, it reaches its setting point at 20-40 min after mixing. The flowability at such early time is very poor, so it must be transported by mechanical transportation methods: conveyor belt and bucket elevator. The design of these devices should consider slope of inclined plane, flow rate of clinker and transportation speed. Storage silos with lift-slope device are also available, whose operation mechanism is similar to slipway hoist.
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Market Demand
AAC blocks are a form of construction material that can be utilised in a number of applications. It is used to construct apartments, terrace houses, hospitals, schools, and commercial constructions. Highways, bridges, and runways are just a few examples of what they can be used for. These blocks are in high demand, particularly in developing countries like India, where the population is quickly increasing and resources are in short supply to meet the country’s construction needs.
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As a result, they must use cost-effective and environmentally friendly building materials to prevent hurting the environment while satisfying these demands. Using local resources has a lesser environmental impact because these materials are plentiful, requiring less transit to collect them. This lowers the overall cost of using these materials for construction. As a result, natural lightweight aggregates like silica sand and limestone powder are critical in a range of industries, including civil engineering, by addressing concerns like global warming and raw material scarcity.
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According to the needed final product qualities, autoclaved aerated concrete (AAC) blocks are created from the above-mentioned raw ingredients, as well as certain extra inert elements, to suit demand. The autoclaved aerated concrete (AAC) market is expected to grow at a CAGR of 7.2 percent from 2020 to 2027, reaching $26,964.5 million. Increased urbanisation and industrialization, infrastructure growth, expanding need for lightweight construction materials, growing preferences for low-cost housing, and an ever-increasing focus on green and soundproof structures are all driving the AAC sector forward.
Key Players:
- Ashoka Pre-Con Pvt. Ltd.
- Baliapatam Tiles & Business Ventures Ltd.
- Biltech Building Elements Ltd.
- Gannon Dunkerley & Co. Ltd.
- H I L Ltd.
- J K Lakshmi Cement Ltd.
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