Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1985-10-02
1987-10-06
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 54, 521 83, 521 841, C08J 922
Patent
active
046983660
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method for the manufacture of insulating, porous, shaped articles and buildings, built with said shaped articles. In particular, the invention relates to a method for the manufacture of insulating, porous, shaped articles such as flat insulating plates, blocks or similar construction elements.
Known from Dutch Patent Application No. 7,113,658 is a method to manufacture porous, shaped articles using expanded plastic spheres, in particular polystyrene spheres, having a bituminous product as a binder between the plastic spheres and the cement, wherein these granules have to be incorporated. The shaped articles thus obtained have a low compressive strength, making them unsuitable for the construction of walls, wall elements and similar constructions therefrom without additional steps. Such a cellular concrete is on occasion also referred to as foamed concrete.
An improvement of said method is described in European Patent Specification No. 31,365, whereby the bituminous odour is avoided and the strength of the shaped article obtained, in particular, the compressive strength, is increased by using a mixture of a bituminous product and waterglass, wherein the waterglass may constitute up to 75% by weight of the mixture, as a binder. The products thus obtained are heat- and moisture resistant and exhibit good heat insulating properties.
SUMMARY OF THE INVENTION
The present invention has as an object to provide a further improvement of this known method, thus providing a product which not only has the advantages of the known products, but in addition can be nailed easily and can be machined with the customary hand tools, while optionally it is also possible to adjust the weight per unit of volume and consequently the compressive strength.
Thus, the invention provides a method for the manufacture of insulating, porous, shaped articles, such as flat insulating plates and insulating plates provided with channels, blocks and similar construction elements, wherein expanded foam plastic spheres are mixed with a binder, capable of causing adherence of the plastic foam to cement, and comprising a bituminous product, at the end of this treatment an amount of granular or powdery material being added to the mixture and compounded therewith until the mass in essence consists of loose spheres again, cement then being added to the mixture and the combination again being subjected to a second mixing operation with dosage of a quantity of water, and the eventual mixture thus obtained being compressed to the desired articles, which are then dried, a proteinaceous foaming agent being added to the spheres between the first and second mixing operation.
In the second step, supplements, such as sand, can optionally be added to the mixture, while said mixture may also be vibrated while compressing to the desired articles.
In this manner articles are obtained with a compressive strength amounting to at least 20 kg/cm.sup.2 and preferably at least 40 kg/cm.sup.2, depending on the amounts of starting material used and the manner of operation, whereas the articles are also very fire resistant. By suitable selection of the amounts of the starting materials a compressive strength is obtained, which is adequate for use of the articles as supporting elements in buildings, for example, also as floor components, which hitherto was not possible. It is equally of considerable advantage that the product obtained according to the invention is not only suitable to put screws in, which applies for the products according to the state of the art as well, but can also be nailed, an additional property not present in classic concrete blocks nor in the already known types of foamed concrete.
If desired, articles obtained after a compression or vibration treatment, can be laid out to dry in a self-supporting condition, without having to keep them enclosed in moulds during drying, as applies also for the articles according to the method of European Patent Specification No. 31,365.
In the method accordi
REFERENCES:
patent: 3272765 (1966-09-01), Sefton
Foelak Morton
Stichting IWL
LandOfFree
Method for the manufacture of insulating porous shaped building does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the manufacture of insulating porous shaped building , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the manufacture of insulating porous shaped building will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2117665