Aci 213r-14 Pdf ^new^

The guide details the physical properties of Structural Lightweight Aggregates (LWA) and how they differ from normal weight aggregates. It explains the concept of equilibrium density, typically between 1120 and 1920 kg/m³ (70 and 120 lb/ft³). 2. Mixture Proportioning

The guide specifies the use of lightweight aggregates such as expanded shale, clay, or slate, which are often processed in rotary kilns to create a porous, low-density structure. Structural Advantages and Applications

This guide provides information on the specification, production, and construction practices for durable concrete. The primary focus of this guide is on the prevention of deterioration and damage to concrete structures, with emphasis on the effects of environmental and other factors on the durability of concrete.

Proportioning lightweight concrete requires a distinct approach from traditional absolute-volume methods because lightweight aggregates continuously absorb moisture. Volumetric Method aci 213r-14 pdf

Handling structural lightweight concrete requires specialized field techniques to ensure consistency and prevent segregation. Proportioning Methodologies

When pre-wetted lightweight aggregates are integrated into a concrete mix, they act as internal water reservoirs. As the cement hydrates and desiccation occurs, the moisture is drawn out of the aggregate pores into the surrounding cement paste. This process reduces autogenous shrinkage, minimizes microcracking, and significantly extends the service life of high-performance concrete bridges and pavements. How to Access the Genuine ACI 213R-14 PDF

): SLC generally has a lower modulus of elasticity than normalweight concrete of the same strength, affecting deflection calculations. The guide details the physical properties of Structural

By replacing heavy coarse aggregates with cellular structures, the self-weight of the concrete is reduced by 20% to 35%. This significantly lowers gravity loads on beams, columns, and foundations. Modulus of Elasticity ( Eccap E sub c

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

A comparative breakdown between and newer code editions Mixture Proportioning The guide specifies the use of

Pumping lightweight concrete introduces unique challenges. The pressure from the concrete pump can force water out of the paste and deep into the pores of the lightweight aggregate. This causes the mix to dry out, stiffen, and potentially plug the line.

SLWC behaves differently under shear and tension. Splitting tensile strength ( fctf sub c t end-sub

The document is structured to cover the lifecycle of a lightweight concrete project:

) used in building codes (like ACI 318) to reduce the calculated shear and development length capacities for lightweight concrete.