Best practices for handling, transporting, and placing lightweight concrete to minimize segregation and ensure proper consolidation. 4. Properties of Hardened Lightweight Concrete
Beyond structural metrics, ACI 213R-14 highlights excellent sustainability and durability advantages. Internal Curing
The guide emphasizes specific handling techniques:
The document is organized systematically to guide professionals from material selection through to final field placement. 1. Structural Lightweight Aggregates aci 213r-14 pdf
Structural engineering and construction professionals constantly seek materials that offer strength, durability, and reduced dead loads. , "Guide for Structural Lightweight Aggregate Concrete," is the definitive resource published by the American Concrete Institute (ACI) that provides comprehensive guidelines for designing, mixing, placing, and analyzing lightweight-aggregate (LWA) concrete.
: It details the physical characteristics of lightweight aggregates, such as absorption, density, and strength.
Lightweight aggregates possess lower thermal conductivity than natural stone aggregates. ACI 213R-14 highlights that SLC provides superior fire-resistance ratings, often allowing for thinner slabs or reduced concrete cover over reinforcing steel to meet local building code fire requirements. Internal Curing Benefits , "Guide for Structural Lightweight Aggregate Concrete," is
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A minimum 28-day compressive strength of 17 MPa (2500 psi).
ACI 213R-14, titled "Guide for Structural Lightweight-Aggregate Concrete," replaces the previous 2003 version. It outlines the properties of lightweight aggregates and the resulting concrete, focusing on materials produced by rotary kiln or sintering processes. The "14" indicates the document was finalized or significantly updated in 2014. Key Content and Sections improving energy efficiency.
Addresses how splitting tensile strength impacts shear and development length equations in structural design.
Equilibrium density between 1120 and 1920 kg/m³ (70 and 120 lb/ft³).
The thermal conductivity of LWAC is roughly half that of normalweight concrete, improving energy efficiency.
Structural lightweight concrete typically has an equilibrium density ranging from 90 to 115 lb/ft³ (1440 to 1840 kg/m³), compared to 145 to 155 lb/ft³ for normalweight concrete. This reduction can lower the overall dead load of a structure by up to 35%.