Intro: "Good morning, everyone. Imagine a major earthquake hits Chattogram City. In an instant, thousands are left without homes. Traditional building methods take months, but today, we are presenting stability in the face of disaster. ConcreteX. We're talking about speed versus Our mission is simple: Use rapid 3D technology to rebuild lives in record time isn't always the right answer. - printing , and why the most advanced technology I am joined by my team: Rakibul, and Munna, as we walk you through the future of emergency housing" Slide 01 First, understand the immense scale. A magnitude 7.5 earthquake could leave up to 200K people homeless. Our plan targets the Mirasharai Economic Zone to house 8,000 families quickly . Each home is designed as a living area, kitchen, and washroom an efficient 25' X 65' unit, featuring . The target density is about 50 houses per square kilometer . The clock is ticking, and the decision we make here will affect tens of thousands of lives. We aren't just building houses; we are building a grid of 54 rows and 150 columns to create an instant community . Slide 05 As innovators, we must be honest. 3D printing in a hot, humid climate like Bangladesh is difficult . We face risks like 'Shrinkage Cracking' due to heat or 'Layer Bonding Failure' where the concrete doesn't stick together properly push too fast, the structure could even buckle also consider . Because of these risks, we must Precast Modular Housing . While 3D printing is faster, Precast offers better quality control and lower technical risk use 3D printing for rapid shelte stability . If we . Our final recommendation is to r, but transition to Precast for long - term Slide 02 How do we print a city? It starts with the right 'ink' —a specialized concrete mix using local materials like Bashundhara cement and Sylhet sand . We add 'superplasticizers' and fibers to make sure the concrete flows perfectly but sets quickly . The total project cost is estimated at 3,507 crore BDT . While that sounds high, remember: we are deploying over 500 3D printers and thousands of workers to achieve what was previously impossible . Slide 03 In a disaster, you have to make choices. We’ve analyzed three paths: Priority , Balanced, and Durability Priority • If we prioritize Speed . Speed, we can print a house in just 24 hours, delivering 10,000 homes in a month . • If we prioritize Durability , the walls are thicker and stronger (35 MPa), but it takes twice as long . For this crisis, we recommend the approach: 32 hours per house, giving us 7,500 high Balanced - quality homes in 30 days Slide 04 3D printing isn't just a machine; it’s a digital pipeline . It starts with a digital 3D model . That model is 'sliced' into layers —think of it like a giant, high- tech hot glue gun . A robotic arm or gantry system follows these paths, laying down concrete layer by layer . We even leave voids in the walls to insert steel reinforcement later, ensuring the house is earthquake - safe .
