One persistent myth is that lightweight concrete is less durable. ACI 213R-14 disproves this with data. It shows that properly air-entrained LWC has exceptional freeze-thaw resistance. Furthermore, due to its lower conductivity, LWC provides significantly better fire resistance than normal weight concrete of the same thickness.
| Property | Typical Criteria for Structural Use | | :--- | :--- | | | 1440 to 1850 kg/m³ (90 to 115 lb/ft³) | | 28-Day Compressive Strength | Minimum 17.0 MPa (2500 psi); Common range 21 to 35 MPa (3000 to 5000 psi) | | Unit Weight | Less than 2000 kg/m³ for many structural applications | | Tensile Strength | Varies, but typically lower than normal-weight concrete of equivalent compressive strength | | Modulus of Elasticity | Lower than normal-weight concrete; dependent on density and strength | | Shrinkage | Often similar to or lower than normal-weight concrete | | Fire Resistance | Superior to normal-weight concrete due to lower thermal conductivity | aci 213r-14 pdf
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. One persistent myth is that lightweight concrete is
[Normalweight Concrete Matrix] [Lightweight Concrete Matrix] Dense Aggregate Particles Porous Expanded Aggregates (High mass, zero water) (Low mass, stores water) │ │ Water only in cement paste Internal Curing Reservoir Specific Gravity Factor Method Furthermore, due to its lower conductivity, LWC provides
The guide details specific criteria that define structural lightweight aggregate concrete. Key mechanical properties covered include: