{"id":2758,"date":"2026-01-13T11:14:56","date_gmt":"2026-01-13T03:14:56","guid":{"rendered":"https:\/\/www.c-adtech.com\/?p=2758"},"modified":"2026-02-02T14:35:16","modified_gmt":"2026-02-02T06:35:16","slug":"ceramic-fiber-blanket-cold-crushing-strength","status":"publish","type":"post","link":"https:\/\/www.c-adtech.com\/fr\/ceramic-fiber-blanket-cold-crushing-strength\/","title":{"rendered":"Couverture en fibres c\u00e9ramiques R\u00e9sistance \u00e0 l'\u00e9crasement \u00e0 froid"},"content":{"rendered":"

Ceramic fiber blankets<\/a> do not possess “Cold Crushing Strength” (CCS) in the traditional engineering sense. CCS is a metric reserved for rigid refractory materials like firebricks<\/a> or AdTech\u2019s Ceramic Insulation Boards. Attempting to measure the CCS of a flexible blanket results in compression rather than crushing. For engineers and purchasers evaluating the durability of ceramic fiber blankets, the correct mechanical properties to prioritize are <\/span>Tensile Strength<\/span><\/strong> (resistance to tearing during installation) and <\/span>Resiliency<\/span><\/strong> (compression recovery). A standard 128kg\/m\u00b3 density ceramic fiber blanket typically exhibits a tensile strength between 0.08 and 0.12 MPa. If your application requires load-bearing capability or high Cold Crushing Strength, you must select a rigid product like <\/span>Ceramic Insulation Board<\/span><\/strong>, not a blanket. AdTech specializes in manufacturing both high-tensile blankets for wrapping and high-CCS boards for structural insulation in aluminum casting foundries.<\/span><\/p>\n

The Misconception of Crushing Strength in Flexible Refractories<\/span><\/h2>\n

In the refractory industry, confusion often arises regarding the terminology of physical strength. Purchase orders or technical data sheets (TDS) sometimes incorrectly request “Cold Crushing Strength” for fiber blankets. Understanding the physics behind these materials is vital for selecting the right insulation for aluminum filtration and degassing equipment.<\/span><\/p>\n

Cold Crushing Strength measures the load per unit area that a refractory material can withstand before failing (crushing) at room temperature. This test follows standards like ASTM C133. However, ceramic fiber blankets are manufactured using spun or blown alumina-silicate fibers intertwined to form a flexible mat. When a load is applied, the blanket does not “crush” or fracture; it compresses and densifies.<\/span><\/p>\n

Therefore, when evaluating AdTech\u2019s ceramic fiber blankets for your facility, focus on these three verified mechanical metrics:<\/span><\/p>\n

    \n
  1. \n

    Tensile Strength:<\/span><\/strong> The maximum stress the material can withstand while being stretched or pulled before breaking.<\/span><\/p>\n<\/li>\n

  2. \n

    Compressive Stress (at X% Deformation):<\/span><\/strong> The force required to compress the material to a specific percentage of its original thickness.<\/span><\/p>\n<\/li>\n

  3. \n

    Linear Shrinkage:<\/span><\/strong> The dimensional stability under high heat.<\/span><\/p>\n<\/li>\n<\/ol>\n

    \"Ceramic
    Ceramic Fiber Blanket Cold Crushing Strength<\/figcaption><\/figure>\n

    Critical Mechanical Properties: Tensile Strength vs. Density<\/span><\/h2>\n

    Since CCS is inapplicable, Tensile Strength becomes the primary indicator of a blanket’s structural integrity. This property is directly influenced by the bulk density of the product and the manufacturing method (spun vs. blown fibers). Spun fibers, which AdTech utilizes, generally offer superior length and intertwining, resulting in higher tensile strength compared to blown fibers.<\/span><\/p>\n

    Higher density blankets contain more fiber mass per volume, creating a tighter matrix that resists tearing. This is particularly important during the installation of lining in ladles or launders, where the material is often pulled around corners or anchored with pins.<\/span><\/p>\n

    Table 1: Correlation Between Density and Tensile Strength in Alumina-Silicate Blankets<\/span><\/strong><\/p>\n

    \n\n\n\n\n\n\n\n
    Bulk Density (<\/span> kg\/m \u00b3)<\/span><\/td>\nTypical Tensile Strength (MPa)<\/span><\/td>\nCompression Resistance (Relative)<\/span><\/td>\nRecommended Application<\/span><\/td>\n<\/tr>\n
    64 (Low)<\/span><\/td>\n0.04 – 0.05<\/span><\/td>\nLow<\/span><\/td>\nBack-up insulation, expansion joint filling<\/span><\/td>\n<\/tr>\n
    96 (Standard)<\/span><\/td>\n0.06 – 0.08<\/span><\/td>\nModerate<\/span><\/td>\nFurnace linings, duct insulation<\/span><\/td>\n<\/tr>\n
    128 (High – AdTech Std)<\/span><\/strong><\/td>\n0.08 – 0.12<\/span><\/strong><\/td>\nHigh<\/span><\/strong><\/td>\nLaunder covers, molten metal transport, hot face lining.<\/span><\/strong><\/td>\n<\/tr>\n
    160 (Ultra-High)<\/span><\/td>\n> 0.15<\/span><\/td>\nVery High<\/span><\/td>\nAreas with high gas velocity or vibration<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Note: Data reflects typical industry averages for spun fiber blankets. AdTech blankets are engineered to meet or exceed the upper bounds of these ranges.<\/span><\/p>\n

    When Cold Crushing Strength Matters: The Role of Ceramic Boards<\/span><\/h2>\n

    If your engineering requirements specifically demand Cold Crushing Strength, your application likely involves load-bearing insulation or areas subject to mechanical erosion from molten aluminum flow. In this scenario, a flexible blanket is insufficient.<\/span><\/p>\n

    You should opt for <\/span>Ceramic Insulation Boards<\/span><\/strong><\/a>. These are vacuum-formed products using the same alumina-silicate chemistry but with added organic and inorganic binders. These binders rigidify the structure, giving it a measurable CCS.<\/span><\/p>\n

    AdTech Ceramic Insulation Board Capabilities<\/span><\/h3>\n

    For aluminum foundries using our degassing units or filtration boxes, we recommend rigid boards for the structural lining. A high-quality ceramic board typically exhibits a Cold Crushing Strength in the range of <\/span>0.3 to 0.5 MPa<\/span><\/strong> (depending on formulation and firing).<\/span><\/p>\n

    Table 2: Mechanical Property Comparison \u2013 Blanket vs. Board<\/span><\/strong><\/p>\n

    \n\n\n\n\n\n\n\n\n
    Feature<\/span><\/td>\nCeramic Fiber Blanket<\/span><\/td>\nCeramic Insulation Board (AdTech)<\/span><\/td>\n<\/tr>\n
    Primary Strength Metric<\/span><\/strong><\/td>\nTensile Strength<\/span><\/td>\nCold Crushing Strength (CCS)<\/span><\/td>\n<\/tr>\n
    Standard Value<\/span><\/strong><\/td>\n0.08 MPa (Tensile)<\/span><\/td>\n0.35 MPa (CCS)<\/span><\/td>\n<\/tr>\n
    Flexibility<\/span><\/strong><\/td>\nHigh (Wrappable)<\/span><\/td>\nNone (Rigid\/Brittle)<\/span><\/td>\n<\/tr>\n
    Resistance to Metal Flow<\/span><\/strong><\/td>\nLow (Requires coating)<\/span><\/td>\nHigh (Resists erosion)<\/span><\/td>\n<\/tr>\n
    Installation Method<\/span><\/strong><\/td>\nAnchors, Pins, Glue<\/span><\/td>\nMortar, Press-fit, Brick-laying<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Factors Influencing Fiber Durability and Performance<\/span><\/h2>\n

    Whether dealing with the tensile capabilities of a blanket or the crushing strength of a board, the microscopic quality of the fiber dictates performance. At AdTech, we strictly control three parameters during the manufacturing of our consumables, including Ceramic Fiber Ropes and Blankets.<\/span><\/p>\n

    1. Shot Content<\/span><\/h3>\n

    “Shot” refers to the non-fibrous ceramic particles (unfiberized droplets) created during production. High shot content is detrimental. It adds weight without adding strength and acts as a stress concentration point.<\/span><\/p>\n