923-1 General Requirements.
Water for use with cement shall be clear and free from oil, and injurious amounts of acid, alkali, chlorides, organic matter, and other deleterious substances. It shall not be salty or brackish. Water that contains quantities of substances which makes it discolored or smell unusual or objectionable, shall not be used unless approved by the Department. Water sources permitted include potable water supplies that a re approved by a public health department, open bodies of water, well water, reclaimed water, and recycled water. Reclaimed water shall be as defined in Chapter 62 -610, F.A.C. Open bodies of water are defined as naturally occurring rivers, lakes, and ponds. Recycled water includes wash water from mixer washout operations and stored in a lined settling pond. Water sources that meet the requirements of Table 923-1, Table 923-2 or from a public health department may be used alone or blended in a storage tank f or use in batching structural or non -structural concrete. All other sources of water not listed above shall be considered recycled and reclaimed water.
923-2 Evaluation of Water for Concrete.
923-2.1 General: Water from potable water supplies approved by a public health
department may be used without additional testing. The concrete producer shall submit test data of water samples from other sources. To determine chemical properties, the concrete producer shall use a laboratory accredited by the Constructi on Materials Engineering Council Accreditation Program including accreditation on referred chemical tests on Table 923-1 and 923-2.
923-2.2 Initial Sampling and Testing Frequency: Open bodies of water and well water
shall be initially sampled once prior to use. Recycled and reclaimed water shall be tested once per week for four weeks initially, and thereafter once per month for four months prior to its use, provided that the results of the test samples comply with all the applicable limits. Failing test results will result in restarting initial sampling and testing.
923-2.3 Production Sampling and Testing Frequency : Open bodies of water and
recycled water shall be tested monthly. Well water and reclaimed water shall be tested once every three months. If th e last eight consecutive well water and reclaimed water samples meet the requirements, then the sample frequency may be reduced to one sample every six months, as approved by the Department. If a well water or reclaimed water sample fails once the frequenc y has been reduced, then the sampling frequency shall revert to once every three months.
923-3 Chemical Requirements.
923-3.1 Testing: All chemical analysis shall be performed in accordance with the test
methods listed in Tables 923-1 and 923 -2 or equivalent Standard Methods for the Examination of Water and Wastewater (SM). Inorganic Anions (Chlorides and Sulfates) shall be determined simultaneously using SM 4110B Ion Chromatography or separately using SM 4500 Cl- B and SM 4500 SO 42- E. ASTM D516 may be used as an alternative method for sulfates. The test method used shall be included in the concrete producer report.
923-3.2 Recycled and Reclaimed Water : Recycled and reclaimed water shall be tested
before use and shall not exceed the limits in Table 923-1: FY 2023-24 Return to Table of Contents Table 923-1 Chemical Test Test Method Maximum (%) Total Solids SM 2540 B 5.00 Total Chlorides as Cl- SM 4500 Cl- B or SM 4110 B 0.05 Total Sulfates as SO 42- ASTM D516 0.30
923-3.3 Open Bodies of Water and Well Water : Open bodies of water and well water
shall be tested before use and shall not exceed the limits of Table 923-2: Table 923-2 Chemical Test Test Method Maximum (%) Alkalinity Calculated in terms of Calcium Carbonate SM 2320 B 0.05 Total Organic Solids SM 2540 E 0.05 Total Inorganic Solids SM 2540 E 0.08 Total Chlorides as Cl- SM 4500 Cl- B or SM 4110 B 0.05
923-4 Physical Requirements for Mortar.
923-4.1 General: To determine physical properties, use a laboratory accredited by the
Construction Materials Engineering Council Accreditation Program or inspected by the C ement and Concrete Reference Laboratory .
923-4.2 Testing: Mortar shall be tested in accordance with ASTM C109 with the
following exception: the mortar shall not be tested for flow. The mortar, composed of the sampled water, shall have a compressive strength of not less than 90% when compared to a mortar prepared using distilled water and tested at seven days. Water of a questionable quality, as determined by the Department, shall be subject to the acceptance criteria for time of set as required by ASTM C1602, Table 1. FY 2023-24 Return to Table of Contents SECTION 924 ADMIXTURES FOR CONCRETE
924-1 General.
This Section covers admixtures for specific concrete applications . Admixtures shall comply with applicable ASTM specifications and the requirements of this Section . Admixtures that have been previously qualified for Department use are listed on the Department’s Approved Product List (APL).
924-2 Acceptance of Admixtures.
924-2.1 Approved Product List ( APL): All admixtures must be listed on the
Department’s Approved Product List (APL). Manufacturers seeking evaluation of their products shall submit an application is accordance with Section 6 and include product data sheets, certified independent test data showing the product meets the requirements of this Section, sa fety data sheet (SDS), and a certification of the average solids content and specific gravity. Admixtures shall meet the following requirements : Air-Entraining - ASTM C260 Type A Water-Reducing - ASTM C494 Type C Accelerating - ASTM C494 Type D Water-Reducing and Retarding - ASTM C494 Type E Water-Reducing and Accelerating - ASTM C494 Type F High Range Water Reducing - ASTM C494 Type G High Range Water-Reducing and Retarding - ASTM C494 Type I - Plasticizing - ASTM C1017 Type II - Plasticizing and Retarding - ASTM C1017 Type S Specific Performance - ASTM C494 and the performance requirements of this Section . Corrosion Inhibitors – ASTM G109 and the requirements of this Section. The inclusion of any specific product on the APL, as specified in 6 -1, indicates that the product has been given contingent approval, as evidenced by previous tests and apparent effectiveness under field conditions. Unless otherwise specified, no further testing will be required for any product on the APL unless there is indication in actual field use of inadequate or unreliable results.
924-2.2 Additional Requir ements for Corrosion Inhibitors : Calcium nitrite is a
chemically reacti ve admixture used in concrete to inhibit the corrosion of embedded reinforcing steel and other metallic components. The calcium nitrite supplier shall submit to the Engineer test certificates from an independent laboratory indicating compliance with this S pecification. The test certificate shall include corrosion inhibiting properties per ASTM G109 and results of physical tests included in this section. Calcium nitrite shall be supplied by the same manufacturing source throughout the project. If a single pr imary source of calcium nitrite cannot be maintained throughout the project, new test certificates shall be submitted. The Engineer will determine specification compliance of a new supplier’s product, and evaluate the effectiveness of the new calcium nitri te product before approving the source. The active ingredient shall be calcium nitrite Ca(NO 2)2. The calcium nitrite shall be furnished in solution containing not less than 29% calcium nitrite solids. The concentration of the calcium nitrite solution s hall be verified by FY 2023-24 Return to Table of Contents