ASTM C is the standard infiltration test for pervious concrete. We recommend that an infiltration test be performed at least annually in multiple locations to identify where and when maintenance might be needed. The test consists of four main components: Installing the infiltration ring, prewetting the concrete, testing the concrete and calculating the results. To install the infiltration ring, first clean the surface. The infiltration ring must meet certain size requirements and be marked with two lines on the interior to correctly perform the test. Once secure, pre-wet the concrete and infiltration ring with 8 pounds of water maintaining the head of water between the two marks on the interior of the ring.
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Document Center Inc. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. These notes shall not be considered as requirements of the standard. Significance and Use Tests performed at the same location across a span of years may be used to detect a reduction of infiltration rate of the pervious concrete, thereby identifying the need for remediation.
The infiltration rate obtained by this method is valid only for the localized area of the pavement where the test is conducted. To determine the infiltration rate of the entire pervious pavement multiple locations must be tested and the results averaged. The field infiltration rate is typically established by the design engineer of record and is a function of the design precipitation event.
This test method does not measure the influence on in-place infiltration rate due to sealing of voids near the bottom of the pervious concrete slab. Visual inspection of concrete cores is the best approach for determining sealing of voids near the bottom of the pervious concrete slab.
ASTM C1701: Infiltration Test