Tecvac, Inc.

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PermeNewaltm Permeation Impregnation Process

This is a method for restoring structural and surface integrity and repairing large areas of vertical or horizontal map cracking or porosity. Results from core testing after treatment have revealed concrete strength increases from 1200psi to 6800psi after treatment.

 

TECVAC'Stm PROPRIETARY IMPREGNATION

PERMEATION PROCESS RESTORES CONCRETE,

MASONRY AND STONE EFFECTIVELY AND

PERMANENTLY.

 

Often, closely meshed fractures (map cracking) are considered impossible or impractical to repair. The maze of cracking is not suitable for individual crack repair application and the usual alternative is to remove the entire structure or area and replace it entirely. This tell tale pattern of map cracking is sometimes evidence of Alkali Silica Reaction (ASR).

 

ASR is uniquely characterized by production of a gel-like reaction product. It is composed of essentially of silica, the alkalis (sodium and potassium), and calcium in the presence of water. Uptake of water by the gel is the primary factor determining volume changes associated with ASR. The gel may be present in large or minute amounts in aggregates, aggregate sockets, air voids, fractures, and on the surfaces of externally formed concretes. (Over 4million sqft of concrete treated with Metered Saturation Soaktm.)

 

PermeNewaltm Restores Concrete, Masonry and Stone Effectively and Permanently

 

Here are some highlights From the APTA Rapid Transit Conference Report:

 

"Rehabilitation and retrofit of aged and distressed rail-transit structures and facilities often calls for unique and innovative engineering solutions, if the requirements of the operating-system safety and reliability, and the construction economy, are to be optimally realized…The concrete deterioration was caused by alkali-aggregate

reaction and by the deicing salts, in conjunction with the freeze-thaw damage. The novel vacuum -impregnation method was used to successfully restore integrity of the

affected concrete and thus obviate the need for platform demolition and reconstruction…. The slab is cast in place using 3500psi concrete…In some instances

the Minnesota Avenue structural slab had deteriorated to such an extent that the core recovery with sufficiently long pieces for compressive testing was not possible. …In a generalized sense, only two basic options were available: Remove the defective concrete and repour, or utilize a procedure capable of in situ restoration of

concrete…This method is based on first creating a partial vacuum in the concrete, a suitable polymer resin is then introduced into the concrete-matrix. The resin fills the

cracks, including micro cracks down to 0.001 inch and less…Control cores were taken before and 8-hours after the completion of the impregnation operation. The

cores were tested to yield a compressive strength ranging from 6,400 to 7,200 psi…. The method was completely successful… susceptibility of rebar to corrosion was also significantly diminished…The rehabilitated slabs are reported to be performing

well."

 

By application of the PermeNewaltm Process to the affected surfaces, vast areas can be structurally renewed, economically sealed and protected permanently. Additionally, where deep crack penetration is an absolute must, technicians will often perform a follow-on refusal confirmation.

 

Our vacuum force technologies have the ability to suspend the applied material vertically. Silanes for instance, can be soaked against the surface for minutes, rather than the conventional roller applied run-off application.

 

Before you even think about tearout and replacement consider PermeNewaltm and Tecvac, Inc....

(Read the full APTA report on ASR)

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Historic Walls Impregnated