1993 English Special Provisions to Item 421 - PORTLAND CEMENT CONCRETE (Statewide & Districtwide, Current)
| SP421-028 | RTF | - Requires acceptance of the concrete be based on it meeting the specified design strength when using compressive strength as the control. All projects with Item 421 (beginning with 10/00 letting). Replaces SP421-024 . Statewide Use. | |
| HOUSTON - DISTRICT 12 | |||
| SP421-059 | RTF | - When entrained air is required, provides for adding 4.5% for Class P concrete. Includes Statewide SP 421---028 requirements. Districtwide Use. | |
| SP421-051 | RTF | - To improve the performance and quality of thin bonded concrete overlay. Districtwide Use. | |
| AUSTIN - DISTRICT 14 | |||
| SP421-032 | RTF | - Provides for using the maturity method. Districtwide Use. | |
| DALLAS - DISTRICT 18 | |||
| SP421-032 | RTF | - Provides for using the maturity method. Districtwide Use. | |
| EL PASO - DISTRICT 24 | |||
| SP421-032 | RTF | - Provides for using the maturity method. Districtwide Use. | |
| HOUSTON - DISTRICT 12 | |||
| SP421-032 | RTF | - Provides for using the maturity method. Districtwide Use. | |
| BEAUMONT - DISTRICT 20 | |||
| SP421-030 | RTF | - Revises the requirements for crushed limestone coarse aggregate in concrete pavement. Districtwide Use. | |
| DALLAS - DISTRICT 18 | |||
| SP421-021 | RTF | - Provides for the use of the maturity method in estimating concrete strength to determine when to open the pavement to traffic. State funded projects only. Districtwide Use. | |
| 1993 English Special Provisions by Item (Statewide & Districtwide, Current) | |||
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