“AAC Blocks are produced when hydrogen bubbles get released and silica comes in contact with the water, lime and aluminum powder. Fly ash can be used here because it contains high amounts of silica. This technology was developed in the 1930s and 40s but came into commercial use only in the 2000s. These days many builders opt for it since lightweight construction saves time in the construction of non-load bearing structures,” explains N. G. Reddy, AAC Technical Head, Dongyue Machinery Group.
He informs that GGBS can be used in place of fly ash but requires a different formula in batching. Considering the fact that GGBS price can be as lower by 30 to 40% to that of cement, many customers are using a combination of cement and blast furnace slag. Also, quality of GGBS varies from source to source. “We give our customers customized solutions, and our batching plants can modify batching GGBS and cement the way we want to set it. We are using the high-end technology from GmbH. Most of the manufacturers either add pressure or vibration, but we are using the triple action German technology which has both vibration pressure and hammering, so that the compaction is faster and more solid.”
“We offer a 360-degree support to our customers which includes installation, warranty and AMC. We offer pre-project support through assistance in project report preparation, and for smaller entrepreneurs, we help them in getting project approval and KVIC subsidy of 35% by the government if their project is below 25 lakhs. We train our customers’ operators and marketing executives on the machines in our factory for 15 days, free of cost, so that they can extract the best output from our machines,” says Reddy.
The ISO 9002 certified company has its main manufacturing facility for making AAC blocks in China, and in India, it has a facility in Bhubaneshwar, Orissa. Its brick and precast concrete pipes making lines are ISI approved for quality. It invests 10% of its turnover in R&D and plans to expand to meet demand. It is currently exporting to Bhutan, Nepal, and Bangladesh, and plans to explore some African countries in the future.