â—The fineness of processing strength reaches 1-74um, and the particle size distribution is narrow and there is no large particle;
â— Materials collide with each other for crushing, can process Mohs hardness 1-10 materials, wear is small, the product no iron pollution;
â— Reasonable cooling flow field, due to the sharp expansion of air flow in the crushing process, the air flow temperature is reduced, so it is particularly suitable for the processing of heat sensitive, low melting point materials;
â— Optimize the structure of the equipment, improve the performance of the equipment, can be effective dispersion and dissociation of agglomerative ultra-fine powder, polymer;
â— Original collection flow field technology, can obtain good crushing efficiency and strict particle size cloth, crushing particle size can be arbitrarily controlled between 1-74um, very fine up to sub-micron level, small material loss, can realize the crushing cavity material basically completely crushed, little participation, equipment wall without dead Angle, easy cleaning, fully in line with GMP standards;
â— Original special jet and split flow field technology, suitable for the processing of dry adhesive materials;
â— Can be mixed and crushed several kinds of materials, and has a good mixing function;
â— Fully sealed negative pressure operation, no environmental pollution.
China Laboratory Air Jet Mill,1-74um Fineness Crusher,Choose High Qualiity Negative Pressure Operation Jet Mill,No Environmental Pollution Pulverizer Shandong Jing Xin Powder Equipment Technology Co., Ltd. , https://www.jxpowder.com
The Hesburgh Library at the University of Notre Dame in Indiana is more than just a building—it's a symbol of faith, education, and architectural beauty. One of its most striking features is the "Word of Life" mosaic, a large-scale artwork that has become famously known as the "Touchdown Jesus." This mosaic, located on the library’s façade, depicts Christ the Teacher surrounded by saints and scholars. What makes it unique is its alignment with the end zone of Notre Dame’s football stadium, creating the illusion that Jesus is signaling a touchdown. The image has become an iconic part of the university's identity and is often captured during games, making it a beloved and recognizable sight.
In 2008, AFP photographer Karen Bleier captured this image, showcasing the library and its famous mosaic against the backdrop of the Notre Dame campus. The photo not only highlights the artistic value of the mural but also emphasizes its connection to the school's sports culture.
Over time, the structure housing the "Touchdown Jesus" mosaic faced structural challenges. Originally built in 1963 using concrete blocks, the air handling system within the library was constructed without proper overlapping joints, leading to instability. As fans were activated, pressure changes caused the walls to flex, resulting in cracks in the mortar. Replacing the entire wall would have been costly and disruptive, so the university sought a smarter solution.
Working with Keller Engineering, Notre Dame chose to reinforce the affected areas using HJ3® Carbon Fiber. This innovative material provided the strength needed to stabilize the structure while preserving the integrity of the historic facade. The project was completed during the winter break, minimizing disruption to students and faculty. The process included surface preparation, crack injection, priming, and the precise installation of carbon fiber fabric. A final layer of steel webbing was added to prevent future deflection.
After reactivating the air system, no movement or deflection was observed, proving the success of the repair. The project saved both time and money, ensuring that the "Touchdown Jesus" mosaic remains intact for future generations. Today, the library stands stronger than ever, thanks to the power of modern materials like HJ3® Carbon Fiber.
For more information about this case study or to learn about HJ3’s range of solutions—HJ3 Civil™ for commercial, CarbonSeal™ for industrial, and StrongHold™ for residential applications—contact us at 1-877-303-0453. We specialize in high-performance composites designed to protect and strengthen structures across various industries.