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Recharge Wrap-up: Ferrock a carbon-negative cement substitute, Audi makes e-diesel

A cement alternative uses recycled materials and traps CO2 rather than producing it. Invented by David Stone at the University of Arizona, Ferrock uses recycled steel dust and glass to produce a substance stronger than conventional concrete. Cement has a high carbon footprint from the high heat needed to process the limestone. Ferrock needs no such heat, and it actually uses CO2 to harden, making it, as Stone calls it, a carbon-negative material. Learn more in the video above, see the transcript at PBS NewsHour and read more at Green Car Reports. Teslarati offers a detailed rundown of Tesla's new Valet Mode feature for the Model S. Part of the Firmware 6.2 update, Valet Mode allows the owner to disable certain performance features and block personal information when letting someone else drive the car. It limits the car's to speed to 70 miles per hour, and caps output at 80 kW. It can also disable mobile app access, Homelink, Bluetooth and wifi and the "Places" function, which stores addresses for you. The folks at Teslarati did find some shortcomings in the new feature, though. Read more at Teslarati. Audi has produced its first batch of e-diesel made from water and CO2. The fuel is made by reacting hydrogen from the water with CO2 to make long-chain hydrocarbon compounds called "blue crude." That can then be refined similarly to crude oil to make e-diesel, which is a fuel free from sulfur and aromatic hydrocarbons. That e-diesel can be used on its own, or mixed with fossil fuel diesel to power a vehicle. "In developing Audi e-diesel we are promoting another fuel based on CO2 that will allow long-distance mobility with virtually no impact on the climate," says Audi Head of Sustainable Product Development Reiner Mangold. Read more in the press release below. Fuel of the future: Research facility in Dresden produces first batch of Audi e-diesel - The verdict: Pilot plant produces high-quality diesel fuel - No need for mineral oil: e-diesel made from water, CO2 and green power - Minister Wanka: "Synthetic diesel using CO2 is a huge success" Audi has taken another big step in the development of new, CO2 neutral fuels: A pilot plant in Dresden has started production of the synthetic fuel Audi e diesel. After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high-quality diesel fuel a few days ago. To demonstrate its suitability for everyday use, Federal Minister of Education and Research Prof.

The Aston Martin DB11 leads this month's list of discounts

We've got something of a broken record to report this month. The 2020 Acura NSX and 2020 Aston Martin DB11 have swapped places atop the discounts leaderboard for a fourth month in a row. For the month of March 2011, it's the British entry again in the lead. The DB11 earns top billing with an average discount of $24,614 off its sticker price, meaning buyers are paying an average transaction price of $177,206. That still a large suitcase full of bills, but at least it means buyers get to stare at a drop-dead beautiful coupe in their driveways with as much as 630 horsepower underhood. And if you love Aston Martin's svelte sense of style but don't want to spend quite so much money, you could always choose the 2020 Vantage that's selling for around $143,000. That's nearly $13,600 off that car's sticker, which is enough to land in seventh spot overall. Up next, as we've come to expect, is the Acura NSX. The hybrid-powered supercar from Japan is selling for $137,663 on average this month, which represents a $22,340 discount and seems like an exceptional deal for a 573-horsepower technological marvel that can scoot from 0-60 in just 2.9 seconds. That also represents the largest percentage of savings off the sticker this month. In third place for the month is the Audi R8, making March the second straight month that this trio of supercars has led the list of discounts. Buyers are saving $18,331 off the R8's sticker, which equals an average transaction price of $175,508. That's awfully close to the selling price of the DB11, for those lucky enough to be deciding between the two. Related Video: Driving Iron Man's Favorite Supercar, The Acura NSX | Translogic 215

Audi sketches out new TT ahead of Geneva debut

In less than two weeks, the doors will open at the Geneva Motor Show, and we'll be there to capture all the action. Among the dozens of new debuts we're looking forward to will be the arrival of the new third-generation Audi TT, and to give us a better idea of what we're looking forward to, Ingolstadt has released this series of teaser sketches.
Looking every bit like a TT should and drawing heavily on the Allroad Shooting Brake concept that debuted at the Detroit Auto Show last month, the images foretell of a new Audi sports coupe with a single-frame grille, matrix LED lighting and a deeply creased hood with the four-ring emblem placed atop the nose, as on the R8.
Horizontal lines at the back preview Audi's next design language, with twin exhaust tips flanking the diffuser on base models and quad tips on the next TTS. A cleaner interior design also harkens back to the first-gen TT that started it all and from which the new one draws its inspiration. Scope out the images in the gallery above for a closer look at what's to come, then scroll down for the details in the press release below.