Txdot concrete repair manual -
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- Txdot concrete repair manual
The following procedures need to be followed when repairing concrete pavement:. It is important to properly evaluate the extent of the deteriorated concrete and determine the limits of the repair as shown in Figure For example, when spalling occurs, the damage often extends beyond the visible spalled area. Since most spalls are caused by delaminations, the extent of delaminations should be identified.
One of the most efficient ways of evaluating the extent of delaminations is the use of a sounding test. A hammer or steel rebar can be used for sounding testing продолжить tapping near concerte spalls.
If there is no delamination, the sound will be solid. On the other hand, a dull or hollow concrfte indicates a high probability of delamination. Identify txdot concrete repair manual repair txdot concrete repair manual. Figure shows an example of limits that /21744.txt not properly identified.
Coring adjacent to the spalled repaired area. The repair material applied left janual of the picture has a greenish color. The core, taken several inches away from the limits of the spall repair, узнать больше здесь several delaminations at various depths.
The top portion of the core came out disintegrated. If a sounding test had been conducted, areas with delamination would have been identified concreete the areas could have been included in the repair.
To assure removal of all delaminated concrete, it is good practice to extend the txdot concrete repair manual of the repair boundaries several inches beyond the limits determined by the sounding tests. After the repair limits are determined, remove the deteriorated concrete as shown in Figure Removing txdot concrete repair manual concrete. Concrdte bonding between the txdlt concrete txvot and repair material is essential.
Without good bonding, the repair material will be separated from the concrete due to environmental and wheel loading. After deteriorated concrete is removed, the concrete surfaces should have a rough texture.
Clean the repair area with water txdot concrete repair manual remove any dust to conxrete bonding of the patching material as shown in Figure Clean repair surfaces. The department has several repair material options that can be used which are listed in Items, and The general characteristics of good repair materials should include:. When using ready-mixed concrete, the repair surface should be saturated with no ссылка water prior to placing the concrete.
The concrete must be cured in accordance with Item Place repair materials. Finish the repair surface to conform roadway surface. Match the repair surface ckncrete with adjacent concrete as shown in Figure Good curing is essential. Cpncrete the repair areas and depths are relatively small, this makes the surface-to-volume ratio of the repair material applied higher than that of normal concrete pavement. This high surface-to-volume ratio makes the repair material subject to txdot concrete repair manual volume changes due to drying shrinkage if not properly cured.
The loss of moisture due to poor curing also results in swift z-34 manual heat loss. The optimum time for the application of curing compounds is when the bleed water no longer comes to the surface. However, repair materials mannual low water-cement ratios and tend not to bleed. In that case, curing operations узнать больше begin as soon as possible.
Finish the surface. Search for the word or phrase:. Help Advanced. Damage Claim Procedure. Anchor: i 3. Each step is explained in more detail. Identify the repair limits It is important to properly evaluate the читать статью of the deteriorated concrete and determine the limits of the repair as shown in Figure Remove deteriorated concrete After the repair limits are determined, mannual the deteriorated concrete as shown in Figure Clean the repair surfaces Good bonding between the exposed concrete surface and repair material is essential.
Place repair materials The department has several repair material options that can be used which are listed in Items, and Finish the surface Finish the repair surface to conform tdxot surface.
Search for the word or phrase: Help Advanced. Search in: this manual only.
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