US1952219A - Construction material - Google Patents

Description

March 27, 1934. J PFOHL 1,952,219

CONSTRUCTION MATERIAL Filed March 25, 1929 Patented Mar. 27,. 1934.

NITE STATES PATENT, OF I E v 1,952,219 i CONSTRUCTION MATERIAL.

corporation of Ohio Application March 25,1929, Serial NQ. 349,541

V 6 Claims. 01. 72-124,

My invention relates to construction material, It is addressed to a construction material while capable of being moulded into any desired form, cut into desired lengths and possessing the qualities of being adapted to absorb shocks, withstand weight, is waterproof, dustless, will not crack and will knit or heal under .trafic.

It is suitable for many .construction purposes, forming a suitable wearing surface for industrial w warehouses, loading platforms, machine shops,

textile mills, garages and many other uses.

In thedrawing I have shown a perspective view of a piece of lumber embodying my invention.

' My improved construction material is formed preferably from a composition containing bituminous and other materials such as mineral particles, fibrous materials, etc. These materials are suitably mixed and are formed into any desired shape,-preferab1y by extrusion, using the method and means described in myco-pending application, Serial No. 39,619 filed June 25, 1925.

In the manufacture of my construction ma;- terial I mix bituminous material such as asphalt and a filler of fibrous material and mineral material in the presence of heat so as .toform' a homogeneous mass which is then passed through an emruding'machine such as that referred to in the above mentioned application, thereby com- ;pacting the mass and forming it into thedesired shape which operation is carried out while the material is warm. It is then allowed to cool and is ready for use. I have found that a very satisfactory construction material is obtained by taking the waste products from the manufacture of prepared roofing, either plain or mineral surfaced, and any other waste saturated felt materials, mixing those with additional asphalt if there is not suflicient asphalt in them, adding if desired additional mineral or fibrous material, or 40 both, masticating these waste materials ,in the presence of heat until reduced to a suitable plastic state when they areextruded by being forced through a die having an orifice of the desired shape so that the material'will completely fill the 5 orifice in its passage therethrough and will retain 'the shape of that orifice after passing outjfrom -thesame.

My improved construction materialcan be made very hard by the addition of mineral or by using at: asphalt that is hard at normal temperatures.

' In myimproved product the body has an outer surface in the nature of a shell B extending inward for some distance that is of greater density and is harder than, the heart (I of the product.

' 1 The depth of this shell may be regulated by the addition gives a greater density to the homogeneous batch'and I have noticed the greater the density of the batch the harder the resultant product, and that by subjecting the batch to greater pressure during the'forming process the outer portion or shell like portion becomes denser and the thickness of the dense hard portion increases with the increase in the pressure. While I have shown and referred to the one method of.

manufacture by extruding the material, any method that would give the resultant product desired would be satisfactory.

My improved product consists preferably'of a homogeneous mixture of bitumen, fibrous material or fibres of any suitable nature, and particles of mineral such as granules of slate or like mineral, fine sand or pulverized mineral, any combination of these minerals, formed into a construction material substantially of the same character throughout except that the outer portion is of a more dense character than the center.

1. A preformed construction product having the same-materials throughout, said materials consisting of a homogeneous mixture of bituminous,

fibrous and mineral materials, said product having the ou er portion harder than the interior. s

2. Apreformed construction product having a shell like outer portion of greater hardness than the interior, said shell and. said interior formed from a homogeneous mixture containing asphalt hard at 'normal temperature and scrap felted materials. V 3. A preformed construction product having a shell like outer portion of greater hardness than. the interior, said shell and said interior formed from a homogeneous mixture containing asphalt hard at normal temperature and scrap felted materials. and granular mineral materials. Y

4. Apreformed construction product, composed of a bituminous material, a mineral material and a fibrous material, preformed to the desired shape and having a portion of said product of greaterdensity and hardnessthan the adjacent portion.

said portions being integral. 5

, mamas 5. Acbnstruction product, composed of e homogeneous mass of bituminous, fibrous and mineral particles, preformed to the desired shape and having a. shell like portion of greater density than the interior portion, said shell like; portion and interior portion being lnwml.

6. A constructon product having a shell like ing a unitary product.

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