SECTION 532: PENETRATING WATER REPELLENT TREATMENT
532.1 Description
This Work consists of providi ng and applying a penetrating wat er repellent treatment to concrete surfaces. See 511.3.10, “Penetrating Water Repellent T reatment Solution” for required application locations.
532.2 Materials
The Contractor shall use a penetrating water repellent solutio n that has a minimum of 40% solution by weight of silane or alkyltrialkoxy silane. The Contractor shall use a solution that does not stain, disco lor, alter the texture of, or form a coating on the concrete surface. The Contractor shall u se a solution that is compatible with surface finishes applied in accordance with Section 511.3. 8.5, “Class 4, Special Surface Finish” and Section 548, “Coating of Concrete.” The Contractor shall provide a treatment solution that is on t he Department’s Approved Products List.
532.2.1 Physical Requirements
The Contractor shall provide a penetrating water repellent sol ution in accordance with Table 532.2.1:1, “Penetrating Water Repellent Treatment Require ments.” Table 532.2.1:1 Penetrating Water Repellent Treatment Requirements Characteristic Requirement Test method Reduction in moisture absorption 80% minimum NCHRP #244 Series II or ASTM D6532 Reduction in chloride ion absorption 80% minimum NCHRP #244 Series II
532.2.2 Submittals
The Contractor shall submit manufacturer’s product data and ap plication instructions to the Project Manager 14 Days prior to start of work. The Project Manager may take sam ples of the Materials from the shipping containers at the job site.
532.3 Construction Requirements
532.3.1 Surface Preparation
Before applying the treatment solution, the Contractor shall r emove curing compounds, laitance, dirt, dust, salt, oil, a sphalt, and other Deleterious Materials from the concrete surface. The Contractor shall obtain approval for surface preparation E quipment from the Project Manager. Section 532: Penetrating Water Repellent Treatment Page 446 The Contractor shall ensure that the cleaning process: 1. Does not damage the concrete surface; 2. Does not remove or substantially alter the existing surface finish; 3. Does not expose coarse aggreg ate in the existing concrete; a nd 4. Provides a reasonably uniform s urface color and texture. Validation for surface preparation shall be performed by apply ing adhesive tape to the surface. When the tape is removed there shall be no laitance o r debris adhered to the tape. The Contractor shall apply the treatment solution only after o btaining approval of the cleaned surfaces from the Project Manager.
532.3.2 Application of Treatment Solution
532.3.2 1 Temperature and Weather Limitations
The Contractor shall apply the treatment solution only when th e air and concrete surface temperatures are between 40 °F and 100 °F, unless more restrict ive temperature limits are recommended by the manufacturer. The Contractor shall not appl y the solution to concrete surfaces when the wind speed is greater than ten (10) mph.
532.3.2 2 Application Equipment
The Contractor shall use Equipment that can apply the solution to all surfaces until they are all saturated and no further solution can be absorbed. The Contractor shall obtain written approval of the Equipment used from the Project Manager before starting application Work.
532.3.2 3 Application
The Contractor shall not treat new concrete until it attains t he specified design strength. The Contractor shall follow the manufacturer’s recommendations for application. The Contractor shall not dilute or alter the treatment solutio n as supplied by the manufacturer. The Contractor shall follow the manufacturer’s recommended rat e of coverage when applying the solution but not less than full saturation and no further solution can be absorbed. The Contractor shall lightly apply water to treated surfaces b etween 12 h and four (4) Days after treatment to verify coverage where directed by the P roject Manager. If the Contract specifies both a water repellent treatment and a special surface finish, the Contractor shall refer to the manufacturer’s application recomm endation on order of application.
532.3.3 Traffic Limitations
The Project Manager will determine when traffic is allowed on treated surfaces.
532.4 Method of Measurement
Penetrating water repellent treat ment of existing concrete sur face areas will be paid for at the contract unit price per square yard.
532.5 Basis of Payment
Pay Item Pay Unit Penetrating Water Repellent Treatment Square Yard
532.5.1 Work Included in Payment
The Department will consider as included in the payment for th e pay item(s) listed in this section and will not measure or pay separately for the followin g: 1. Penetrating Water Repellent Treatment applied to surfaces of new concrete structures will be considered as included in the payment for th e main items and will not be paid for separately. 2. Penetrating Water Repellent Treatment applied to repaired co ncrete surfaces will be considered as included in the pa yment for the main items and wi ll not be paid for separately. Section 533: Concrete Structure Repair Page 448