#self-healing concrete

[dduane]

This is soooooo interesting. The Romans were the ancient world’s materials-technology engineers par excellence: this is just another example of it. 

[jamaicahomescom]

Exploring Self-Healing Concrete: A Prospective Construction Material in Jamaica

Concrete has a bad rap over the years around the world and in Jamaica, but bacteria may provide an answer. What happens when you introduce green technology which embeds self-activating bacteria into concrete? It becomes self-healing and three UK universities are actively working towards bringing this science to life. Self-healing concrete brings together two fields: civil engineering and marine…

[ianmiller42]

More on Roman Concrete

I started this year off with a post on Roman concrete, and since this will be my last post for 2023, why not end with the same subject? You might think there cannot be much more to say about that, but that would be wrong. You may think that once you have concrete, it will be there forever; it is effectively a rock, but that is not true. First, there are a range of cements. The very first one was…

[nnctales]

Navigating the Depths: Unveiling the Intricacies of Tunnel Construction Works

Introduction Tunnel construction is a fascinating and complex realm within civil engineering, playing a crucial role in connecting regions, facilitating transportation, and overcoming geographical obstacles. As we delve into the depths of tunnel construction works, we uncover a world where engineering prowess meets geological challenges, creating passageways that redefine connectivity and…

[eco-mixmaterialsincorporated]

Aside from Portland cement in Illinois, blended cementitious materials have become increasingly popular in the construction industry due to their sustainability, durability, and cost-effectiveness. Here are some innovative uses for blended cementitious materials.

[materialsscienceandengineering]

Riddle solved: Why was Roman concrete so durable?

An unexpected ancient manufacturing strategy may hold the key to designing concrete that lasts for millennia.

The ancient Romans were masters of engineering, constructing vast networks of roads, aqueducts, ports, and massive buildings, whose remains have survived for two millennia. Many of these structures were built with concrete: Rome’s famed Pantheon, which has the world’s largest unreinforced concrete dome and was dedicated in A.D. 128, is still intact, and some ancient Roman aqueducts still deliver water to Rome today. Meanwhile, many modern concrete structures have crumbled after a few decades.

Researchers have spent decades trying to figure out the secret of this ultradurable ancient construction material, particularly in structures that endured especially harsh conditions, such as docks, sewers, and seawalls, or those constructed in seismically active locations.

Now, a team of investigators from MIT, Harvard University, and laboratories in Italy and Switzerland, has made progress in this field, discovering ancient concrete-manufacturing strategies that incorporated several key self-healing functionalities. The findings are published today in the journal Science Advances, in a paper by MIT professor of civil and environmental engineering Admir Masic, former doctoral student Linda Seymour ’14, PhD ’21, and four others.

Read more.

[inabigworld]

sometimes

i can hear my bones straining under the weight of all the lives i’m not living

—

[diariesofanoldsoul]

If a rose can grow through the concrete so can you 🧱🥀

[gaymom]

the fact u immediately throw people with low empathy under the bus is super funny also Lol. god forbid people with npd be wary of people who use narcicissm as an insult as if the word isnt intrinsically tied to the disorder now. we look up resources and are constantly fucking bombarded with articles telling us we're abusive monsters for having npd. have a little decency bro.

yeah you can't pretend that all discussions of narcissism are implicitly tied to the disorder. Narcissist isnt just an insult, although the traits associated with it are definitely negative under a non-individualistic value system. Narcissist is also a word that has been used by people far before NPD was researched and defined in the dsm. The word describes someone with low empathy and a specific affect to their ego that is self focused and disregarding of others. The FACT is that the vast majority of individuals with narcissistic traits DO NOT ACKNOWLEDGE that they have narcissistic traits that negatively impact those close to them NOR DO THEY PURSUE MEDICAL SUPPORT OR DIAGNOSIS FOR IT. Which is exactly why I haven't talked about people with Narcissistic Personality Disorder. Often those who find nothing wrong with taking advantage of others end up finding communities/workplaces where their disregard for others is valued, and that's pretty easy in a capitalist society where many people look up to those with narcissistic traits for the power they have over other people. There are plenty of abuse survivors who have experienced narcissists like Amber Heard not take accountability and take their smear campaigns to the public stage and still successfully take advantage of the biases of large populations of people who form impressions off of lies.

So maybe take a look at your reactivity to people talking about this topic and why you felt the need to send me this, because it's disregarding the subject of my posts and is disconnected from the material reality of narcissistic traits and their effect on social systems. But I'm guessing this is a personal feeling of insecurity on your part that you identify with the narcissists I'm talking about because instead of recognizing I'm talking about abusive narcissists who don't take accountability and don't seek help and take lies and cruelty too far, YOU IDENTIFY with the narcs Im referencing and send me this pity party about how hard it is for you to hear how angry people talk after being hurt by people who let your condition go unchecked. Low empathy is not a sub-human trait, I dont think people without empathy are monsters. But I KNOW some of those people dismiss the reality of their low empathy and the damage they do BECAUSE of their narcissism. So maybe, be less wary of people talking about the damage of narcissism and be more wary of how your biases can lead you to being out of touch.

[joleneghoul]

That new trend where people are asking their husbands/bfs how often they think about the roman empire and most of them have like a notes app doc with a list of shit they think abt regarding it weekly or sometimes daily and dont think thats like an insane amount is so Rip Hunter to me but like only about concrete and aqueducts and shit (regarding that time)

[softtopxpressions]

Some of my best moments happen when I’m trying something new (a.k.a. while I’m busting my ass). 🎶ROLL SKATE!🎶

F.Y.I Concrete Still Hurts On Impact 😅

Sucking at some thing is the first step at being sort of good at something ~Jake the Dog (Adventure Time ⚔️)

[nnctales]

Bendable Concrete Block: A Revolution in Construction Material

Introduction In the vast realm of construction materials, a revolution is taking place: bendable concrete blocks. Imagine a world where concrete – a brittle, rigid material – can flex and self-repair. Sounds like a fantasy, right? However, researchers and engineers are turning this dream into reality, using a remarkable fusion of innovation, scientific discovery, and technological application.…

[deadstonemasonssociety]

The benefits of hot mixing are twofold

First, when the overall concrete is heated to high temperatures, it allows chemistries that are not possible if you only used slaked lime, producing high-temperature-associated compounds that would not otherwise form.

Second, this increased temperature significantly reduces curing and setting times since all the reactions are accelerated, allowing for much faster construction.

[materiallugy]

Self-healing materials

Human skin has the ability to heal and repair itself when it gets hurt by a process done by the live cells. Imagine if we have a materials can do this when the material is cracked or damaged, it will repair itself and the crack will disappear without any human intervention!

[materialsscienceandengineering]

In hopes of producing concrete structures that can repair their cracks, researchers from Drexel University's College of Engineering are putting a new twist on an old trick for improving the durability of concrete. Fiber reinforcement has been around since the first masons were mixing horsehair into their mud. But the Drexel research team is taking this method to the next level by turning reinforcing fibers into a living tissue system that rushes concrete-healing bacteria to the site of cracks to repair the damage. Recently reported in the journal Construction and Building Materials, Drexel's "BioFiber" is a polymer fiber encased in a bacteria-laden hydrogel and a protective, damage-responsive shell. The team reports that a grid of BioFibers embedded within a concrete structure can improve its durability, prevent cracks from growing and enable self-healing.

Read more.