Durability and Sustainability: The report highlights the long-term durability of SLWC. The internal curing provided by moisture-saturated lightweight aggregates helps reduce micro-cracking and improves the bond between the cement paste and the aggregate. Furthermore, using these materials can contribute to LEED certification due to reduced transportation emissions and improved building energy performance. Why Professionals Search for ACI 213R-14
The primary advantage of using SLWC is the reduction of dead loads in a structure. This allows for smaller foundations, longer spans in bridges, and thinner floor slabs in high-rise buildings. By reducing the overall weight of the building, developers can save on seismic reinforcement and structural steel costs, often offsetting the higher initial price point of the lightweight aggregates themselves. Key Technical Highlights of ACI 213R-14 aci 213r-14 pdf
Mixture Proportioning: Unlike traditional concrete, lightweight aggregates often absorb more water. ACI 213R-14 explains the nuances of "pre-wetting" or "pre-saturation" of aggregates to prevent them from sucking water out of the paste during mixing, which could lead to loss of workability and poor hydration. Why Professionals Search for ACI 213R-14 The primary
Structural lightweight concrete is defined by its use of lightweight aggregates, such as expanded shale, clay, or slate, which result in a significantly lower density than normalweight concrete. While standard concrete typically weighs between 140 and 150 pounds per cubic foot (pcf), SLWC generally ranges from 90 to 115 pcf. Despite this reduced weight, the material maintains a compressive strength comparable to traditional concrete, typically exceeding 2,500 psi. typically exceeding 2