{
    "success": true,
    "data": {
        "id": 1641411,
        "msgid": "this-is-what-prevents-ready-mix-concrete-from-spilling-from-a-concrete-mixer-truck-1774770680",
        "date": "2026-03-29 14:03:30",
        "title": "This is What Prevents Ready-Mix Concrete from Spilling from a Concrete Mixer Truck",
        "author": "Muhammad Idris",
        "source": "KOMPAS",
        "tags": "",
        "topic": "Infrastructure",
        "summary": "The mechanism that keeps liquid concrete from spilling during transport in mixer trucks relies on the drum's counter-clockwise rotation in mixing mode, which, combined with internal spiral blades, pushes the mixture inward to maintain stability. This prevents separation or premature hardening of the concrete, which could occur within an hour if the drum stops rotating, ensuring quality upon arrival at construction sites. For pouring, the rotation reverses to clockwise, expelling the concrete efficiently, highlighting the critical engineering behind infrastructure material handling as explained by Indonesia's Ministry of Public Works and Housing.",
        "content": "<p>Many people are curious about how liquid concrete mixture doesn\u2019t\nspill while being transported by a concrete mixer truck on the roads.\nYet, this vehicle often travels on various road conditions, from\nstraight to undulating paths. It turns out there is a technical\nmechanism that keeps the concrete safe inside the drum during the\njourney. This system involves the direction of the drum\u2019s rotation, the\ndesign of the spiral blades inside it, and the proper operation\ntechniques. Summarised from the Ministry of Public Works and Housing,\none of the main keys is the direction of the drum\u2019s rotation. When\ncarrying concrete, the mixer truck\u2019s drum rotates counter-clockwise,\nknown as the \u201cmixing\u201d direction. This rotation prevents the mixture from\nbeing pushed out; instead, it holds it inside the drum. Inside the drum,\nthere are spiral or helical blades made of steel that resemble threads.\nWhen the drum rotates in transport mode, these blades function to push\nthe concrete inward. Thus, even though it\u2019s in liquid form, the mixture\nstays inside and doesn\u2019t spill. Without this rotation, the materials in\nthe concrete could separate. Moreover, the concrete risks starting to\nharden before reaching the project site. Interestingly, this rotation\ndirection is reversed during the pouring process. When the truck arrives\nat the site, the drum is rotated clockwise so that the spiral blades\npush the mixture out from inside the drum. It\u2019s important to note that\nthe drum\u2019s rotation is not just an additional feature but an absolute\nnecessity in concrete transportation. If the drum stops rotating for too\nlong, the concrete can start to harden in about one hour. This condition\nnot only damages the concrete\u2019s quality but also potentially damages the\nmixer drum itself.<\/p>",
        "url": "https:\/\/jawawa.id\/newsitem\/this-is-what-prevents-ready-mix-concrete-from-spilling-from-a-concrete-mixer-truck-1774770680",
        "image": ""
    },
    "sponsor": "Okusi Associates",
    "sponsor_url": "https:\/\/okusiassociates.com"
}