Materiales de Construccion (Journal)’s Post

✅ 𝗦𝗵𝗲𝗮𝗿 𝗺𝗼𝗱𝘂𝗹𝘂𝘀 𝗮𝗻𝗱 𝗱𝗮𝗺𝗽𝗶𝗻𝗴 𝗿𝗮𝘁𝗶𝗼 𝗼𝗳 𝗿𝗲𝗰𝘆𝗰𝗹𝗲𝗱 𝗰𝗼𝗻𝗰𝗿𝗲𝘁𝗲 𝗮𝗴𝗴𝗿𝗲𝗴𝗮𝘁𝗲 𝗳𝗿𝗼𝗺 𝗰𝘆𝗰𝗹𝗶𝗰 𝘁𝗼𝗿𝘀𝗶𝗼𝗻𝗮𝗹 𝘀𝗵𝗲𝗮𝗿 𝘁𝗲𝘀𝘁 / 𝙈𝙤𝙙𝙪ł 𝙨́𝙘𝙞𝙣𝙖𝙣𝙞𝙖 𝙞 𝙬𝙨𝙥𝙤́ł𝙘𝙯𝙮𝙣𝙣𝙞𝙠 𝙩ł𝙪𝙢𝙞𝙚𝙣𝙞𝙖 𝙠𝙧𝙪𝙨𝙯𝙮𝙬𝙖 𝙗𝙚𝙩𝙤𝙣𝙤𝙬𝙚𝙜𝙤 𝙥𝙤𝙘𝙝𝙤𝙙𝙯𝙖̨𝙘𝙚𝙜𝙤 𝙯 𝙧𝙚𝙘𝙮𝙠𝙡𝙞𝙣𝙜𝙪 𝙯 𝙘𝙮𝙠𝙡𝙞𝙘𝙯𝙣𝙚𝙜𝙤 𝙩𝙚𝙨𝙩𝙪 𝙨́𝙘𝙞𝙣𝙖𝙣𝙞𝙖 𝙨𝙠𝙧𝙚̨𝙩𝙣𝙚𝙜𝙤 👤 Katarzyna Gabryś 📝 This study examines the small-strain dynamic properties of three mixtures of recycled concrete aggregate (RCA) using laboratory investigations typical of natural soils, namely cyclic torsional shear (CTS) tests. In order to construct two samples, crushed concrete curbs originating from a demolition site in Warsaw was employed. To create the third sample, crushed concrete from demolished buildings also Warsaw was used, mainly from concrete wall and floor elements. A series of CTS tests were performed to investigate the impact of various parameters. The resulting stiffness and damping characteristics of the analysed concrete aggregate were compared with those of natural gravel and sand aggregate – natural aggregate (NA). The results collected from the CTS tests indicate that the performance of most RCA is comparable to that of NA and can be used as an unbound granular material (UGM). 📎 https://tiny.pl/dmsn5

Do Fibers impact the finish surface of your Concrete? Tyler Ley, PE, PhD, a concrete expert, tests fiber reinforced concrete! He describes in this video how steel and plastic (macrosynthetic) fibers effect surface smoothness and reduced cracks in concrete. Are you curious about how your initiatives might benefit from this underutilized technology? See the video for helpful hints and suggestions that are simple to put into practice.  https://lnkd.in/g4qjQ6kw #concrete #contractors #concretefibers #reinforcedconcrete #construction #concretecracks #concretetesting

To enhance the durability of reinforced concrete in marine environments, engineers can use additional measures such as cathodic protection, epoxy-coated reinforcing steel, or fibre-reinforced polymer (FRP) composites. Overall, when properly designed, constructed, and maintained, reinforced concrete structures exhibit good durability in marine environments. More info in the last post of our Principia Ingenieros Consultores Blog.

Do fibers in concrete really work? Concrete expert Tyler Ley, PE, PhD, puts fiber reinforced concrete to the test! In this video, he explains how plastic (macrosynthetic) and steel fibers impact concrete performance, reducing cracking and affecting surface finish. Curious about how this underutilized technology can improve your projects? Watch the video for practical tips and easy-to-implement recommendations.  https://lnkd.in/gxmUsqzY

The field of concrete technology, while full of challenges, can also be quite fascinating. One can observe the Slant shear testing on composite samples of ultra-high-performance concrete and high-performance concrete. During this experiment, a cylindrical specimen is filled with two types of concrete in a staggered arrangement, and after curing, it is subjected to compressive loading.

--Brainstorming Session: Designing M-65 Concrete Hello everyone, I’m reaching out to tap into our collective expertise on designing M-65 concrete using the following aggregate properties: 1. Coarse Aggregate: Specific Gravity: 1.45 min - 2 Max Abrasion Value: 38 Impact Value: 32 Crushing Value: 28 Combined Elongation and Flakiness: 26 Water Absorption: 1.8% Gradation: Passing 2. Fine Aggregate: Natural Sand Silt Content by Weight: 2.5% Zone: 2 Water Absorption: 2% 3. Durability and Design Criteria: Total Chloride: 0.15% Total Sulphate: 3.75% Permeability: 10 mm max RCPT: Less than 1000 Coulomb Maximum Cement Content: 450 kg/m³ Maximum Mineral Admixture: 10% Given these conditions and adhering to IS code requirements, how would you approach designing M-65 concrete? What considerations, techniques, or adjustments would you suggest to ensure we achieve the desired strength and durability? Looking forward to your innovative ideas and insightful discussions! #ConcreteDesign #Brainstorming #M65Concrete #CivilEngineering #Construction #Durability #AggregateProperties #ISCode #ConcreteTechnology

🚧 Optimizing Concrete's Fresh Properties with NanoJelly 🚧 In the construction industry, workability, ease of mixing, and consistency of concrete are key to efficiency on-site. NanoJelly, a groundbreaking graphene-based admixture, is designed to enhance the fresh properties of concrete, giving immediate advantages before the concrete even sets: 💧 Improved Workability: NanoJelly improves the fluidity of concrete mixtures, making it easier to pour and shape without compromising strength, even with lower water content. This ensures smoother application and reduced labor efforts. ⚡ Lower Pump Pressures: By improving concrete rheology through uniform graphene dispersion, NanoJelly increases mass flow rates, allowing projects to stay on schedule or even finish ahead of time—translating into labor and energy savings. 🔋 Reduced Fuel Consumption: By improving concrete flow and reducing the pressure required for pumping, NanoJelly helps cut down fuel consumption in pump generators. This translates into lower operational costs and a smaller carbon footprint for large-scale projects. 🎯 Rebound Reduction: NanoJelly helps maintain the uniformity of the concrete mix, significantly reducing rebound and waste on shotcrete and gunite applications. Investing in NanoJelly for your concrete solutions means more efficient operations, better performance on-site, and fewer complications during placement—delivering clear cost benefits from day one. 🚀 #ConcreteTechnology #NanoJelly #GrapheneInnovation #ConstructionEfficiency #ConcreteMixing #BuildingBetter #ConstructionIndustry #InnovationInConstruction #ConcreteEfficiency #AdvancedMaterials #GrapheneTechnology #ConstructionSustainability #ConcreteAdmixtures #PumpEfficiency #BuildingSustainably #MaterialScience #InfrastructureInnovation

When the project demands nothing short of high-strength concrete (Grade 70 MPa), mass concreting, early strength, all while keeping it eco-friendly and cost-effective, that's when you call in the experts. Say goodbye to trial-and-error and hello to seamless, efficient results!

Colloidal silica consists of fine silica particles suspended in a liquid, usually water. These nanoparticles have a high surface area, which allows them to interact effectively with other materials. When mixed with concrete, colloidal silica reacts with calcium hydroxide, a byproduct of cement hydration, to form additional calcium silicate hydrate (C-S-H). This chemical interaction is crucial because C-S-H is the primary compound responsible for the strength and durability of concrete. For those looking to dive deeper into the world of colloidal silica and its applications in concrete construction, I highly recommend visiting www.colloidalsilica.org. This website serves as a valuable resource, providing access to a community of like-minded professionals and enthusiasts committed to advancing concrete technology. Engage with peers, share insights, and explore collaborative opportunities to create concrete solutions that enhance durability and longevity. Together, we can drive innovation and elevate standards in the construction industry.

The construction standards in the USA are officialy changed. ASTM International’s (West Conshohocken, Pa., U.S.) composite materials committee (D30) has approved a new standard that addresses material requirements for glass fiber-reinforced polymer (GFRP) dowel bars used as load transfer devices in concrete paving. D8444/D8444M describes the use of non-corroding GFRP dowel bars in civil infrastructure, specifically highway and street paving, as well as in the presence of inductance loops or sensors used in high-speed tolling zones. Another step forward to more durable concrete pavements. Hopefully several countries will follow this example. p.s. read the full article in the comments of this message! #construction #concrete #concreteslabs #paving