Home » Open thread 4/4/22

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Open thread 4/4/22 — 11 Comments

  1. I’d seen this a few years ago; it was cool then, too. So now I’m wondering what that formula, recipe, is for making concrete or Roman concrete.

    This Ancient Rome site give is a good, simple explanation:
    https://www.vita-romae.com/roman-concrete.html

    This Berkely (+Saudi !!) page has more details about the differences:
    https://newscenter.lbl.gov/2013/06/04/roman-concrete/

    And this more speculative geopolymer Roman inspired formula is also cool:
    https://www.instructables.com/Roman-Geopolymer-Concrete-Recipe/

    The water-lime reaction producing heat to cure the cement has always been interesting.

    There’s a note in one about not using beach sand, tho is doesn’t say why. Because it’s too smooth, and for strength you want more small jagged sand. Which the world has been using up the low cost sources of, so you might even hear about the shortage of sand – for construction with concrete.

    Like so many others, Neo’s posts are always so interesting.

  2. The volcanic ash of Roman concrete was used in building the Suez Canal in the 19th century. The source was the island of Thera, which was destroyed by a volcanic eruption in 1600 BC. The modern island of Santorini is covered to a depth of 200 feet by ash. The canal builders used this ash to build the concrete walls of the canal. By mining this ash, they discovered the Minoan city of Akrotiri that was destroyed by the eruption. The concrete composed of this ash is far superior especially in its resistance to water damage and erosion,.

  3. With neo here in California for cataract surgery, perhaps the relatives with whom she is staying will mention the California legislature’s AB 2223.
    This bill would add a new section to California’s statutes (emphasis added):

    SEC. 7. Section 123467 is added to the Health and Safety Code, to read:
    123467. (a) Notwithstanding any other law, a person shall not be subject to civil or criminal liability or penalty, or otherwise deprived of their rights, based on their actions or omissions with respect to their pregnancy or actual, potential, or alleged pregnancy outcome, including miscarriage, stillbirth, or abortion, or perinatal death.
    (b) A person who aids or assists a pregnant person in exercising their rights under this article shall not be subject to civil or criminal liability or penalty, or otherwise be deprived of their rights, based solely on their actions to aid or assist a pregnant person in exercising their rights under this article with the pregnant person’s voluntary consent.

    Would the drafters have used the phrase “notwithstanding any other law” if they did not intend to absolutely completely remove liability, civil and criminal, for abortion and infanticide?

  4. Mike K —

    So what you’re saying is, when we run out of jaggedy sand for concrete, we can just mine Mt. St. Helens?

  5. So what you’re saying is, when we run out of jaggedy sand for concrete, we can just mine Mt. St. Helens?

    Maybe so. But it may explain how Roman structures have lasted so long.

  6. My sister just watched “Soylent Green” (1973) and noticed that this old dystopian sci-fi film, which terrified her when she first saw it, was set in 2022.
    _____________________

    By 2022, the cumulative effects of overpopulation, pollution and an apparent climate catastrophe have caused severe worldwide shortages of food, water and housing. There are 40 million people in New York City alone, where only the city’s elite can afford spacious apartments, clean water and natural food (at horrendously high prices, with a jar of strawberry jam fetching $150). The homes of the elite are fortified, with private security, bodyguards for their tenants, and usually include concubines (who are referred to as “furniture” and serve the tenants as slaves).

    https://en.wikipedia.org/wiki/Soylent_Green
    _____________________

    I was 21 at the time and I bought this apocalyptic scenario, which was seemingly coming from everywhere back then. The think tank consultant, Herman Kahn, being the sole exception.

    I didn’t expect to survive into the 21st century. If I seem excessively optimistic these days, in no small part it’s gratitude that I’m still alive and as healthy and comfortable as I am. I resolved not to be panicked again with doom and gloom predictions.

    I’m not crazy about how things have worked out lately in the good old USA. But it could be worse, much worse, and *generally* things are not as bad as I fear. I prefer to err on that side of things.

  7. On COVID, so far OK.

    1. Worldometers reports that the seven-day moving average of deaths is now about 3,500. Might expect an upward revision as week-end activity is incorporated. NB, from 1 April 2020 to 24 March 2022, this metric never fell below 4,900 per day.

    2. The post-omicron wave hitting a selection of European countries appears to have peaked in the Netherlands, Britain, Italy, and perhaps France, with case counts hitting plateaux. Limited echo in death statistics.

    3. Cases still declining at a slow rate in the United States and Sweden. No post-omicron wave yet.

    4. Note, after the initial explosion in the death toll in the U.S. in March and April of 2020, the nadir of this metric for calendar year 2020 and for calendar year 2021 was reached at the same time of the year – the 1st week of July. Death counts in the United States are now falling below those recorded at the beginning of July 2020. If the case counts are reliable as a leading indicator, the death counts might before the end of the month fall below those recorded at the beginning of July 2021.

    5. Our World in Data reports the census of COVID cases in ICUs in the United States at 1,867 as of 2 April 2022. This is the lowest value recorded since Our World In Data began reporting this datum for the United States on 16 July 2020.

  8. https://instapundit.com/513344/#respond

    Have a gander at this.

    A large percentage of the curators in this country deserve to be in the unemployment line, with the collections they supervise sold off to private parties and the museums in which they are housed demolished. Have a gander at what’s been happening at the School of the Art Institute in Chicago for another example.

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