Thermal Conductivity Concrete Block Wall

C k w is the thermal resistance of the concrete section l m is the thickness of the section in the direction of the heat flux k.

Thermal conductivity concrete block wall.

As for the furring used for interior insulation the thermal resistance of the concrete masonry webs and any grouted cores should be accounted for when determining the thermal performance of the wall see tek 6 2c ref. Dense aggregate blocks consist of cement sand and various aggregates such as barite magnetite iron or lead pellets and has a typical thermal conductivity of 0 70 1 30 w mk. All offer high levels of thermal performance. Walls can either be solid or an internal veneer.

Dense aggregate concrete blocks are manufactured from cement sand and aggregates. First the guarding heat box method was used to obtain the heat transfer coefficient of the hollow shale block walls. If the block layer or section is solid and made of concrete its thermal resistance can be obtained by equation 3 r. Typical thermal conductivity.

Resistance r value of concrete block walls as a result of using perlite loose fill insulation in the block cores. Thermal conductivity is a material property that describes ability to conduct heat thermal conductivity can be defined as the quantity of heat transmitted through a unit thickness of a material in a direction normal to a surface of unit area due to a unit temperature gradient under steady state conditions. Thermal conductivity of polystyrene. Product data sheet 400 x 250 x 200mm l x w x h 1.

3 for tabulated r values of walls with core insulation. C l k. To reduce energy consumption and protect the environment a type of hollow shale block with 29 rows of holes was designed and produced. The experimental heat transfer coefficient is 0 726 x2009 w.

0 70 1 28 w mk. Concrete blocks can be used effectively in a variety of external wall construction systems including solid wall construction brick and block cavity wall or two layers of block work with a cavity. Thermal mass in walls. 400 x 250 x 200mm l x w x h 3.

Concrete blockwork can generally be divided into three categories. Thermal insulated sandwich block. Thermal transmission value of block u value 0 210 watt m2k. This paper investigated the thermal properties of hollow shale blocks and walls.

C w m k is the concrete thermal conductivity and. Brick concrete concrete block including insulated and aerated types and rammed earth can be used for internal or external walls if they catch the sun or are close to a radiant heat source. Dense aggregate light aggregate and cellular aircrete sometimes known as aerated concrete.