Excellent skid resistance / wet-weather grip — the open texture exposed coarse stones create high macrotexture (friction). This is crucial in Odisha’s heavy rains — reduces hydroplaning and shorter braking distances.

Are India’s New Expressways Eating Truck Tyres? Truckers are reporting tyre life dropping sharply on some new corridors. Normal heavy truck tyre life: ~50,000–60,000 km If it drops by even 25%, fleet costs explode → freight inflation → everything becomes expensive. This is not emotion. It’s physics. 🧵👇 1️⃣ How Roads Are Supposed to Work Road surface has 2 textures: • Microtexture → Grip • Macrotexture → Water drainage & high-speed stability Macrotexture is measured globally using: EN 13036-1 (Sand Patch Method) ASTM E965 ISO 13473-1 Indian guidance references MTD ~0.7–1.1 mm band. If texture is too aggressive → tyres behave like they’re running on sandpaper. 2️⃣ Most Likely Root Causes 🔴 Over-aggressive tining (concrete roads) 🔴 Segregation / low binder (asphalt roads) 🔴 Early ravelling exposing sharp aggregates 🔴 Poor curing leading to scaling & pop-outs Result: Higher tread deformation heat micro-cutting → faster wear. When complaints cluster on the SAME stretch, it’s almost always surface engineering. 3️⃣ How To Prove It (No Politics, Just Testing) ✔ Corridor-wise macrotexture mapping ✔ Friction/skid resistance testing ✔ Core sampling (binder %, air voids, compaction) ✔ Ravelling/scaling audit Publish data by chainage. Transparency kills corruption. 4️⃣ International Practice Developed highway systems: • Texture within strict performance limits • Contractor payment tied to durability • 6/12/24 month performance warranty • Public friction & surface audits India builds wide & fast highways. Now we need world-class surface QA discipline. 5️⃣ Remedies 🛠 Concrete too harsh → Diamond grinding 🛠 Ravelling asphalt → Mill & relay wearing course 🛠 Mix defect → Enforce density & plant QA 🛠 Governance → Performance-based contracts Bottom Line If a new expressway is chewing tyres, it’s not “driver imagination.” It’s either: • Texture imbalance • Construction quality issue • Or both. And it’s completely measurable. Infrastructure should reduce costs — not grind them away.

It’s called “Concrete Tining” yes on home slabs with a broom it leaves a great finish that helps with traction. But we have a machine we use on freeways that leave a macrotexture which provides drainage channels for water and helps tires grip the pavement in wet conditions. 👍

Foto Interessante da Melbourne determinazione della profondità della trama della superficie asfalto i valori di profondità della macrotexture derivati da questo metodo di prova sono applicabili alla stima delle caratteristiche di resistenza allo scivolamento della superficie

Image: demonstrative macrotexture geometry of the methodology applied with graphene oxide. A GO dough is layered as a thin coat to the valley with thickness ≈ 600 μm. The frost nucleates at the peak regions first because of the larger mass of supercooled water and then propagates toward the valley.

No More Frost: Scientists Unveil Long-Lasting Anti-Freeze Technology | SciTechDaily The optimized surface completely prevents frost formation on flat areas for up to one week. One day, we might finally say goodbye to defrosting freezers or scraping frost off slippery surfaces. Engineers at Northwestern University have developed a new strategy to prevent frost formation before it even starts. In a new study, the researchers discovered that tweaking the texture of any surface and adding a thin layer of graphene oxide prevents 100% frost from forming on surfaces for one week or potentially even longer. This is 1,000 times longer than current, state-of-the-art anti-frosting surfaces. As an added bonus, the new scalable surface design also is resistant to cracks, scratches, and contamination. By incorporating the textured surface into infrastructure, the researchers imagine companies and government agencies could save billions of dollars per year in averted maintenance costs and energy inefficiencies. The research was recently published in the journal Science Advances. “Unwanted frost accumulation is a major concern across industrial, residential, and government sectors,” said Northwestern’s Kyoo-Chul Kenneth Park, who led the study. “For example, the 2021 power crisis in Texas cost $195 billion in damages, resulting directly from frost, ice, and extreme cold conditions for more than 160 hours. Thus, it is critical to develop anti-frosting techniques, which are robust for long periods of time in extreme environmental conditions. It is also necessary to develop anti-frosting methods which are easy to fabricate and implement. We designed our hybrid anti-frosting technique with all of these needs in mind. It can prevent frosting for potentially weeks at a time and is scalable, durable, and easily fabricated through 3D printing.” Park is an assistant professor of mechanical engineering at Northwestern’s McCormick School of Engineering and a faculty affiliate of the Paula M. Trienens Institute for Sustainability and Energy and the International Institute for Nanotechnology. Leaf-inspired discovery The new study builds upon previous work from Park’s laboratory. In 2020, Park and his team discovered that adding millimeter-scale textures to a surface theoretically reduced frost formation by up to 80%. Published in the Proceedings of the National Academy of Sciences, the research was inspired by the rippling geometry of leaves. “There is more frost formation on the convex regions of a leaf,” Park said at the time. “On the concave regions (the veins), we see much less frost. People have noticed this for several thousands of years. Remarkably, there was no explanation for how these patterns form. We found that it’s the geometry — not the material — that controls this.” Through experimental work and computation simulations, Park and his collaborators found that condensation is enhanced on the peaks and suppressed in the valleys of wavy surfaces. The small amount of condensed water in the valleys then evaporates, resulting in a frost-free area. Graphene-oxide trapping power In the previous study, Park’s team developed a surface featuring millimeter-scale peaks and valleys with small angles in between. In the new study, Park’s team added graphene oxide on flat valleys, which reduced frost formation by 100% in those valleys. The new surface comprises tiny bumps, with a peak-to-peak distance of 5 millimeters. Then a thin layer of graphene oxide, just 600 microns thick, coats the valleys between peaks. “Graphene oxide attracts water vapor and then confines water molecules within its structure,” Park said. “So, the graphene oxide layer acts like a container to prevent water vapor from freezing. When we combined graphene oxide with the macrotexture surface, it resisted frost for long times at high supersaturation. The hybrid surface becomes a stable, long-lasting, frost-free zone.” When compared to other state-of-the-art anti-frosting surfaces, Park’s method was the clear winner. While superhydrophobic (water repelling) and lubricant-infused surfaces resisted 5-36% of frost formation for up to 5 hours, Park’s surface resisted 100% of frost formation for 160 hours. “Most other anti-frosting surfaces are susceptible to damage from scratches or contamination, which degrades surface performance over time,” Park said. “But our anti-frosting mechanism demonstrates robustness to scratches, cracks, and contaminants, extending the life of the surface.” Why it matters This hybrid macrotexture-graphene oxide surface offers a promising solution for preventing frost formation in various applications. Most people only worry about frost when it coats their car windshield or kills their outdoor plants. But frost is more than a nuisance. Frost on airplane wings can create drag, making flights dangerous or even impossible. When accumulating inside freezers and refrigerators, frost greatly reduces energy efficiency in appliances. Frost can add too much weight to power lines, leading to breakage and, ultimately, power outages. It also can impair sensors on vehicles, harming their ability to accurately detect objects. “Developing new anti-frosting techniques is crucial to preventing costly mechanical failures, energy inefficiencies, and safety hazards for critical operations,” Park said. “There currently is no ‘one-size-fits-all’ approach because every application has specific needs. Although airplanes only require seconds of frost resistance, powerlines operating in cold environments might require days or weeks of frost resistance, for example. With our new insights, we could design powerlines and airplane wings with reduced ice adhesion. These types of alterations would greatly reduce yearly maintenance costs.” Reference: “Robust hybrid diffusion control for long-term scalable frost prevention” by Christian Machado, Benjamin Stern, Haiyue Huang, Asma Ul Hosna Meem, Jiaxing Huang and Kyoo-Chul Kenneth Park, 30 October 2024, Science Advances. DOI: 10.1126/sciadv.adq8525 The study was partially supported by the National Science Foundation (grant number CBET-2337118) and the Korea Institute for Science and Technology (grant number 2E32527). Read more: scitechdaily.com/no-more-fro…

"Graphene oxide attracts water vapor and then confines water molecules within its structure," Park said. "So, the graphene oxide layer acts like a container to prevent water vapor from freezing. When we combined graphene oxide with the macrotexture surface, it resisted frost for long times at high supersaturation. The hybrid surface becomes a stable, long-lasting, frost-free zone."

Farewell frost! New surface prevents frost without heat. Optimized surface prevents 100% of frost formation on flat areas for a week. This hybrid macrotexture-graphene oxide surface offers a promising solution for preventing frost formation in various applications. Most people only worry about frost when it coats their car windshield or kills their outdoor plants. But frost is more than a nuisance.  Frost on airplane wings can create drag, making flights dangerous or even impossible. When accumulating inside freezers and refrigerators, frost greatly reduces energy efficiency in appliances. Frost can add too much weight to power lines, leading to breakage and, ultimately, power outages. It also can impair sensors on vehicles, harming their ability to accurately detect objects. news.northwestern.edu/storie…

Researchers at the Illinois Center for Transportation tested the use of macrotexture as an indicator of the percent embedment (PE) of aggregate in a chip seal on 24 chip seal sections in the state of Illinois. Here are the results: buff.ly/3POuPHz

A new Materials in #CivilEngineering paper developed a model for predicting the macrotexture of road mixtures with low aggregate size. Research that will help reduce noise and improve safety on roads. @CI_ASCE Free Access Through November 30: doi.org/10.1061/JMCEE7.MTENG…

Surface Macrotexture Depth using a Volumetric Patch Technique, in accordance with BS EN 13036-1:2010 Just one of a wide range of tests we can undertake. Check our Schedule of Accreditation on the @UKAS website (#8011) & don’t hesitate to contact TD for all your testing needs 📞

macrotextureに比べ低いとはいえmicrotexureでも1/82000は生じるリスクはあるわけで伝えるのは良いと思うのだけども…（smooth typeは0だから良いかもしれないが）。 その82000人のうちの一人になったときに聞いてないよーとなったら大変。 稀ではあるので説明した上で豊胸するかは本人の希望次第

Further testing on the @lpoolcouncil Liverpool Lime Street Connectivity scheme for @HuytonAsphalt this week, outside the magnificent @SGHLpool 🏛 #td #tdct #ensuringqualityinconstruction #ukas #8011 #testing #site #laboratory #asphalt #surfacing #surfaceregularity #macrotexture

Intriguingly, Silverstone had just been resurfaced with Delugrip, a road surface developed by Dunlop and Birmingham University, with a mix of two differently sized aggregates, and specific micro and macrotexture. Also seen here at Hammersmith flyover: books.google.co.uk/books?id=…

Thank you everybody who's picked up a Macrotexture in the last couple days! (And thank you @neymrqz for shouting them out) There's still some available and I still have a few remaining to mint in the next few days 💛 objkt.com/collection/KT1LR8H…

Another Macrotexture 😁 10/10 for 1tz objkt.com/asset/KT1LR8Hp7u5X…

The equipment has a laser scan that can give the aspect of the macrotexture of the pavement. They are used in many areas to detect noise generation or in this example, to measure the coefficient of friction in the track. The equipment is heavily used in airport's pavement.

#quirkyalonester #expressyourself #experimental #expiriment #textures #textureart #texturephotography #macro #braid #macrophotography #abstract #abstractphotography #ArtistOnTwitter #art #artistsupport #red #black #nerddreamer #artshare #macrophoto #textureshot #macrotexture

Will this pavement lack macrotexture?

The Intelligent Safety Assessment Vehicle (iSAVe) 300 km continuously measures wet skid resistance together with asset imagery and parameters such as roughness, rutting, macrotexture, road geometry and spatial and linear referencing location.