{"id":2062,"date":"2026-02-02T12:42:32","date_gmt":"2026-02-02T12:42:32","guid":{"rendered":"https:\/\/www.conideas.com.et\/?post_type=engineering_tool&#038;p=2062"},"modified":"2026-02-26T22:56:51","modified_gmt":"2026-02-26T22:56:51","slug":"concrete-strength","status":"publish","type":"engineering_tool","link":"https:\/\/www.conideas.com.et\/am\/engineering_tool\/concrete-strength\/","title":{"rendered":"Concrete Compressive Strength Calculator"},"content":{"rendered":"<div class=\"engineering-tool\" id=\"concreteStrengthTool\">\n\n  <!-- =============================\n       TEST INPUTS CARD\n       ============================= -->\n  <div class=\"tool-card\">\n    <h3>Concrete Strength Test<\/h3>\n\n    <!-- Concrete Grade -->\n    <div class=\"tool-row\">\n      <label for=\"grade\">Concrete Grade<\/label>\n      <select id=\"grade\" required>\n        <option value=\"\">Select grade<\/option>\n        <option value=\"20\">C20<\/option>\n        <option value=\"25\">C25<\/option>\n        <option value=\"30\">C30<\/option>\n        <option value=\"35\">C35<\/option>\n        <option value=\"40\">C40<\/option>\n      <\/select>\n    <\/div>\n\n    <!-- Cement Type -->\n    <div class=\"tool-row\">\n      <label for=\"cement\">Cement Type<\/label>\n      <select id=\"cement\" required>\n        <option value=\"\">Select cement<\/option>\n        <option value=\"opc\">OPC<\/option>\n        <option value=\"ppc\">PPC<\/option>\n      <\/select>\n      <small id=\"cementAdvice\" style=\"display:block; color:#555; font-size:0.85rem;\">\n        Select cement type for guidance (OPC \u2192 faster early strength, PPC \u2192 slower but more durable).\n      <\/small>\n    <\/div>\n\n    <!-- Failure Load -->\n    <div class=\"tool-row\">\n      <label for=\"failureLoad\">Failure Load (kN)<\/label>\n      <input\n        type=\"number\"\n        id=\"failureLoad\"\n        min=\"1\"\n        step=\"0.1\"\n        placeholder=\"Enter failure load\"\n        required\n>\n    <\/div>\n\n    <div class=\"tool-manual-override\">\n      <label class=\"tool-checkbox\">\n        <input type=\"checkbox\" id=\"manualStrengthToggle\">\n        <span>Override calculated strength<\/span>\n      <\/label>\n\n      <div class=\"tool-manual-input\">\n        <input \n          type=\"number\"\n          id=\"manualStrength\"\n          step=\"0.1\"\n          placeholder=\"Strength (MPa)\"\n          disabled\n>\n        <small>Uses calculated result by default.<\/small>\n      <\/div>\n    <\/div>\n\n    <!-- Curing Age -->\n    <div class=\"tool-row\">\n      <label for=\"agePreset\">Curing Age (Days)<\/label>\n      <select id=\"agePreset\">\n        <option value=\"7\">7 Days<\/option>\n        <option value=\"14\">14 Days<\/option>\n        <option value=\"28\">28 Days<\/option>\n        <option value=\"other\">Other (3\u201327)<\/option>\n      <\/select>\n      <input\n        type=\"number\"\n        id=\"customAge\"\n        min=\"3\"\n        max=\"27\"\n        placeholder=\"Enter custom age (3\u201327)\"\n        style=\"display:none; margin-top:0.5rem;\"\n      >\n    <\/div>\n\n    <!-- Cube Area -->\n    <div class=\"tool-row\">\n      <label for=\"cubeArea\">Cube Area (mm\u00b2)<\/label>\n      <input\n        type=\"number\"\n        id=\"cubeArea\"\n        value=\"22500\"\n        min=\"10000\"\n        step=\"1\"\n      >\n      <small>Default = 150 \u00d7 150 mm cube (editable)<\/small>\n    <\/div>\n\n    <!-- Structure Element -->\n    <div class=\"tool-row\">\n      <label for=\"structure\">Structure Element (Optional)<\/label>\n      <select id=\"structure\">\n        <option value=\"\">Select element<\/option>\n        <option value=\"foundation\">Foundation<\/option>\n        <option value=\"column\">Column<\/option>\n        <option value=\"beam\">Beam<\/option>\n        <option value=\"slab\">Slab<\/option>\n        <option value=\"shearwall\">Shear Wall<\/option>\n      <\/select>\n    <\/div>\n\n    <!-- Actions -->\n    <div class=\"tool-actions\">\n      <button id=\"calculateBtn\" class=\"btn-primary\">Calculate Strength<\/button>\n      <button id=\"predictBtn\" class=\"btn-secondary\">Predict Strength<\/button>\n      <button id=\"project28Btn\" class=\"btn-secondary\">28-Day Projection<\/button>\n      <button id=\"resetBtn\" class=\"btn-reset\">Reset<\/button>\n    <\/div>\n\n    <!-- =============================\n         TEST RESULT CARD\n         ============================= -->\n      <div id=\"resultBox\" class=\"tool-result\" style=\"display:none;\">\n        <p>\n          Strength: <strong id=\"strengthValue\">0<\/strong> MPa\n          <span id=\"strengthArrow\" class=\"strength-indicator\"><\/span>\n        <\/p>\n\n        <div class=\"strength-bar\">\n          <div class=\"strength-bar-track\">\n            <div id=\"strengthFill\" class=\"strength-bar-fill\"><\/div>\n          <\/div>\n        <\/div>\n\n        <small id=\"strengthNote\"><\/small>\n      <\/div>\n\n    <!-- =============================\n         PREDICT STRENGTH CARD\n         ============================= -->\n    <div id=\"predictBox\" class=\"tool-result\" style=\"display:none;\"><\/div>    \n\n    <!-- =============================\n         28-DAY PROJECTION CARD\n         ============================= -->\n      <div id=\"projectBox\" class=\"tool-result tool-collapsible\" style=\"display:none;\">\n        <strong>28-Day Strength Projection (Indicative)<\/strong>\n        <p>\n          Projected range:<br>\n          <strong id=\"projectedMin\">0<\/strong> \u2013 <strong id=\"projectedMax\">0<\/strong> MPa<br>\n          Reference mid-range: <strong id=\"projectedMid\">0<\/strong> MPa\n          <span id=\"projectArrow\" class=\"strength-indicator\"><\/span>\n        <\/p>\n          <small id=\"projectNote\">\n          Trend indication only \u2014 not for acceptance. Maintain proper curing, compaction, and hydration.\n        <\/small>\n      <\/div>\n\n  <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Calculate and interpret concrete compressive strength test results at 7, 14, and 28 days, including pass\/fail assessment and common causes of low strength.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0},"class_list":["post-2062","engineering_tool","type-engineering_tool","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.conideas.com.et\/am\/wp-json\/wp\/v2\/engineering_tool\/2062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.conideas.com.et\/am\/wp-json\/wp\/v2\/engineering_tool"}],"about":[{"href":"https:\/\/www.conideas.com.et\/am\/wp-json\/wp\/v2\/types\/engineering_tool"}],"wp:attachment":[{"href":"https:\/\/www.conideas.com.et\/am\/wp-json\/wp\/v2\/media?parent=2062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}