Basalt Basket and Dowel and Method of Manufacture

a basket and dowel technology, applied in the field of concrete reinforcement, can solve the problems of affecting the performance of concrete, and affecting the performance of concrete, and achieve the effect of improving the loading

Inactive Publication Date: 2016-08-04
GLOBAL ENERGY SCI CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]In light of the above and according to one aspect of the invention, disclosed herein is a basalt basket for positioning of dowels to provide improved loading between adjoining concrete slabs.
[0008]An objective of the present invention is to provide a continuous basalt fiber material matrix configuration that is an economical and sustainable alternative to steel dowel and basket construction, the basalt basket capable of securely holding dowels in alignment even if struck during the concrete pouring step.
[0009]Another objective of the present invention is to provide a dowel and basket system that cannot rust like steel which otherwise can absorb or wick water into the concrete.

Problems solved by technology

Misplaced or misaligned dowel bars can adversely affect the performance of the concrete.
Misaligned dowel bars can lock up the joints and prevent them from opening and closing freely resulting in spalling, faulting, pumping, corner breaks, blowups, and mid-panel cracking.
Because of the difficulties in determining the position of dowel bars in hardened concrete, misplaced dowel bars went largely undetected in the past, until it was too late and problems started to develop.
Most jointed concrete pavement failures can be attributed to failures at the joint, as opposed to inadequate structural capacity.
Because these joints are so numerous, their performance significantly impacts pavement performance.
As this happens, several of the adjoining contraction joints may open, effectively destroying their seals and aggregate interlock.

Method used

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  • Basalt Basket and Dowel and Method of Manufacture
  • Basalt Basket and Dowel and Method of Manufacture
  • Basalt Basket and Dowel and Method of Manufacture

Examples

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Embodiment Construction

[0038]The purpose of the dowels is to transfer loads across a joint without restricting joint movement due to thermal contraction and expansion of the concrete. Studies have shown that larger dowels are more effective in transferring loads and in reducing faulting. Dowels should be corrosion-resistant to prevent dowel seizure, which causes the joint to lock up. Epoxy-coated and stainless steel dowels have been shown to adequately prevent corrosion. Smooth dowels are the most widely used method of transferring load across expansion joints. Expansion joint dowels are specially fabricated with a cap on one end of each dowel that creates a void in the slab to accommodate the dowel as the adjacent slab closes the expansion joint.

[0039]Dowel baskets are used to ensure that the dowels are properly aligned. Conventional dowel baskets are constructed from steel, are about 24″×12′ in dimension. A steel dowel basket weighs about 50 lbs and a steel dowel that is about 1½″×24″ weigh about 20 lbs...

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Abstract

Basalt basket and dowel system to provide load transfer between adjoining slabs. The basket is designed as a placement jig to properly position dowels during the concrete placement phase of construction. Additionally to provide inherently tinsel and shear reinforcement to the edge of the concrete before during and after the contraction stress of curing concrete is relieved by scoring and to do so without the risk of rust spalling. The baskets and dowels are constructed from continuous basalt fibers admixed with an appropriate adhesive to produce the required strength and provide load predictions in a similar manner to steel calculations. The basalt basket is light weight and the configuration of its tendons interlaces provides sufficient space to allow concrete flow during placement and too prevent tinsel slippage within the cured concrete.

Description

PRIORITY APPLICATION AND RELATED APPLICATIONS[0001]In accordance with 37 C.F.R. 1.76 a claim of priority is included in an Application Data Sheet filed concurrently herewith. Accordingly, the present invention claims priority date to, U.S. Provisional Patent Application No. 62 / 109,269 entitled “BASALT BASKET AND DOWEL AND METHOD OF MANUFACTURE”, filed Jan. 29, 2015. This application is related to U.S. patent application Ser. No. 13 / 436,653, entitled “MATRIX BASALT REINFORCEMENT MEMBERS FOR PERVIOUS CEMENT”, filed Mar. 30, 2012. The contents of the above referenced applications are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to concrete reinforcement, and more particularly, to a basket and dowel reinforcement members made from continuous basalt fibers for use in load transfer between adjoining slabs.BACKGROUND OF THE INVENTION[0003]Due to constant expanding and contracting of concrete used in the formation of highways, joints are placed between...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E01C11/14E01C11/16
CPCE01C11/16E01C11/14E01C19/504
Inventor SMITH, DONALD R.
Owner GLOBAL ENERGY SCI CALIFORNIA
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