{
    "name": "Concrete Curing Time Plan Calculator",
    "url": "https://calculators.geekmidst.com/calculators/concrete-curing-time-plan-calculator",
    "markdown": "https://calculators.geekmidst.com/calculators/concrete-curing-time-plan-calculator.md",
    "category": "Construction",
    "description": "Turn a pour date and your specified periods into calendar dates for the end of curing, formwork striking, prop removal and cube or cylinder tests.",
    "summary": "Enter the pour date and the periods your specification or engineer sets. The calculator turns them into calendar dates so the site team can plan around them.",
    "also_called": [
        "Concrete curing schedule calculator",
        "Formwork striking date calculator"
    ],
    "applies_to": "Worldwide",
    "last_updated": "2026-10-29",
    "computation": "Results are computed in the visitor’s browser on the HTML page. This API describes the calculator; it does not compute results.",
    "inputs": [
        {
            "name": "pour_date",
            "label": "Pour date",
            "type": "date",
            "default": ""
        },
        {
            "name": "curing_days",
            "label": "Curing period",
            "type": "number",
            "default": "7",
            "unit": "days"
        },
        {
            "name": "strip_days",
            "label": "Strike side formwork after",
            "type": "number",
            "default": "2",
            "unit": "days"
        },
        {
            "name": "prop_days",
            "label": "Remove soffit props after",
            "type": "number",
            "default": "14",
            "unit": "days"
        },
        {
            "name": "test_age",
            "label": "Strength test age",
            "type": "number",
            "default": "28",
            "unit": "days"
        }
    ],
    "outputs": [
        {
            "key": "curing_end",
            "label": "Curing ends",
            "format": "text"
        },
        {
            "key": "strip_date",
            "label": "Strike side formwork",
            "format": "text"
        },
        {
            "key": "prop_date",
            "label": "Remove soffit props",
            "format": "text"
        },
        {
            "key": "test_date",
            "label": "Strength test",
            "format": "text"
        },
        {
            "key": "pour",
            "label": "Pour date",
            "format": "text"
        }
    ],
    "formula": {
        "text": "Event date = Pour date + n calendar days",
        "variables": {
            "n": "days after pouring for each event, from your specification"
        }
    },
    "worked_example": {
        "inputs": {
            "pour_date": "2026-11-02",
            "curing_days": "7",
            "strip_days": "2",
            "prop_days": "14",
            "test_age": "28"
        },
        "steps": [
            "Pour on Monday 2 November 2026.",
            "Strike sides at +2 days = 4 Nov; curing ends at +7 = 9 Nov; props out at +14 = 16 Nov.",
            "The 28-day test falls on 30 November."
        ],
        "result": "For a pour on 2 November 2026, curing ends on 9 November and the 28-day test is on 30 November."
    },
    "interpretation": "Dates are calendar days. In cold weather concrete gains strength more slowly, so the same strength takes longer; follow your engineer’s instructions or test results over the calendar.",
    "assumptions": [
        "Periods are counted in calendar days from the day of the pour."
    ],
    "limitations": [
        "Does not predict strength gain; striking and prop removal must follow the engineer’s criteria or test results."
    ],
    "rules": null,
    "faqs": [
        {
            "question": "Why is 28 days used for testing?",
            "answer": "Specified strengths are commonly defined at 28 days, so test specimens are crushed at that age to check compliance."
        },
        {
            "question": "Can I strike formwork sooner in hot weather?",
            "answer": "Sometimes, but only on the engineer’s say-so, ideally backed by early-age strength tests."
        }
    ],
    "sources": [],
    "related": [
        {
            "name": "Concrete Calculator",
            "url": "https://calculators.geekmidst.com/calculators/concrete-calculator"
        },
        {
            "name": "Construction Schedule Float Calculator",
            "url": "https://calculators.geekmidst.com/calculators/construction-schedule-float-calculator"
        },
        {
            "name": "Date Difference Calculator",
            "url": "https://calculators.geekmidst.com/calculators/date-difference-calculator"
        }
    ],
    "disclaimer": "Quantities are estimates. Confirm requirements with your engineer or supplier before ordering materials.",
    "publisher": "GM¹X CalcVerse"
}