FR2505907A2 - Stratified thermal insulation block for wall - has different concrete densities suiting function of layer location on core - Google Patents

Abstract

The composite block has three layers of different density light colloidal concrete. The core layer (3) of least density has the greatest thickness and is faced on one side by an external dressing (4) of less thickness but greater density and an internal dressing (2), also of less thickness and greater density than the core. The two outside layers provide, between them, all the load bearing capacity required of the block without taking into account any supplementary load bearing properties of the core. The top block is protected by a capping block.

Description

 We have described, in the main patent, a construction material having the appearance of a block or block of heterogeneous constitution, with adjacent strata of different compositions of concrete in the thickness direction and, in particular, a stratum main in lightweight colloidal concrete (abbreviated: BCL) occupying a major fraction of the thickness of the block. Thus, in the example given of a block of standardized thickness of 30 cm, said main layer of BOL extends over a thickness of 26 cm, the remaining 4 cm consisting of a layer of common concrete which can be lightened by the use of suitable aggregates.

 The subject of the present invention is such a construction material with strata of concrete of different compositions in the thickness direction. According to the invention, all the strata are made of BCL but of different densities, the stratum of lower density occupying the fraction greater in thickness and being bordered on both sides by strata of lesser thickness and higher density, one of which may also be thicker and less dense than the other.

 Thus, a block is made having a major intermediate stratum forming Eme in very low density BCL, sandwiched between two minor minor strata in higher density BCL.

According to a technical feature of the present invention, the block thus produced is intended for installation, during the construction of a wall, so that the two terminal minor strata form, respectively, an internal facing and an external facing ensuring them only the lift required for construction, apart from the additional lift provided by the intermediate major stratum
The heterogeneous composition of this block in three vertical layers of different crush resistance, overlaps the obligation to distribute the lift over the entire horizontal surface of the blocks - whenever a significant vertical force can be exerted in a point on the wall: for example, on
the upper seat receiving the weight of the frame, or in line with the side walls of the windows.

 For this purpose, there is provided - in addition to the normal block described above - a special block which can be used for the triple use "hunting - lintel distributions of the portancen.

 The description which follows with reference to the appended drawing, given by way of nonlimiting example, will make it clear how the invention can be implemented, the features which emerge both from the drawing and from the descriptive text which, of course, is part of the present invention.

 The single figure is a schematic view in vertical section of a wall fragment formed of blocks according to an embodiment of the present invention.

 We can see on the drawing, at the top of the wall, the special block S "carnage - lintel - load distribution", 20 cm high and 30 ci thick (standard dimensions).

 This block is composed of a stratum-facing 4 4 cm thick, the rest being made up of width 26 cm by homogeneous BCL of density 800 kg / i3, for example, in which is formed a groove 5 which will be filled with concrete - or reinforced concrete - by the mason at the time of assembly.

We see below, the normal block also 20 cm high and 30 cm thick formed of three successive layers of BCL of different densities, but all much lower than that of conventional concrete, which is around 2300 kg / m3 - a final layer of internal facing 2 of 6 ci
BOL thickness of the order of 800 kg / m3, - an intermediate layer of friend 3 of 20 cm thick
in BCL of the order of 400 kg / m3, providing significant thermal insulation, - a final layer of external facing 4 of 4 cm
BOL thickness of around 1400 kg / m3, resistant
moisture.

 We could, moreover, further strengthen the thermal insulation by providing variants of concrete blocks of 35 ci or even 40 cm thick, the insulating goose stratum 3 would therefore occupy 25 or 30 cn,

Claims (4)

 1. Construction material appearing as a heterogeneous building block with adjacent strata of different concrete compositions in the thickness direction, characterized in that all the strata are made of light colloidal concrete (BCL) but of different densities, the stratum (3) of lower density occupying the major fraction of the thickness and being bordered, on both sides, by strata of lesser thickness and higher density, one of which (2 ) can also be thicker and less dense than the other (4).  2. Block according to claim 1, characterized in that it consists of a major intermediate stratum forming Goose (3) in very low density BOL sandwiched between two terminal minor strata (2,4) in BCL more high density.  3. Block according to claim 2, characterized in that it is intended A Stre posed, during the construction of a for, so that the two terminal minor layers respectively drill an internal facing (2) and an external facing ( 4) ensuring the lift required for construction alone, without taking into account the additional lift provided by the major intermediate summer stratum (3).  4. Block according to claim 3, characterized in that the minor terminal layers of facing (2, 4) are of different thicknesses.