United States Department of Transportation
i
Test Procedure for Rapid Mix Design of Cement-Treated Base
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2024-05-01
[PDF-265.83 KB]
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Abstract:SCOPE: 1.1 Tex-120-E consists of three parts. 1.1.1 Part I determines the moisture-density curve of material treated with cement. 1.1.2 Part II determines the target cement content using the unconfined compressive strength of samples molded in accordance with Tex-113-E and cured for 7 days. 1.1.3 Part III develops a laboratory mixture design for cement-treated bases using the indirect tensile (IDT) strength. The IDT strength may also be used to verify the strength of materials sampled from the roadway after mixing. Test specimens are compacted to 4 in. in diameter and 2 in. in height using a Superpave gyratory compactor (SGC). The specimens are cured 72 hours and then moisture-conditioned 24 hours prior to IDT testing. When performing a mixture design, the automatic tamper (compaction) device is only required for compacting samples to 6 in. in diameter and 8 in. in height for a moisture-density curve.
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