Displaying items by tag: California

US: A fire was successfully fought at Lehigh Cement’s 0.8Mt/yr integrated Tehachapi plant near Bakersfield, California on 8 December 2019. The Bakersfield Californian has reported that there were no injuries and no cause of the fire has been identified. Access difficulties exacerbated by extreme weather conditions caused fire crews to make two additional assistance calls.

US: Heliogen, a new technology venture, says it has concentrated solar energy to exceed temperatures greater than 1000°C at its commercial plant in Lancaster, California. The company hopes to use the process to replace fossil fuels used in industrial cement, steel and petrochemical production processes. It is using computer vision software to align a large array of mirrors to reflect sunlight to a single target.

The company is based in Pasadena, California and is lead by Bill Gross, the founder of Idealab, a US technology startup incubator. Heliogen is supported by Parsons Corporation, a company that operates in defence, intelligence and critical infrastructure markets. Other backers include Bill Gates, the co-founder of Microsoft.

US: CalPortland has been awarded a US$175,000 grant from the Mojave Desert Air Quality Management District (MDAQMD) to replace a 1999 Terex Bore/Drill rig with a 2019 Caterpillar MD2650 drill. The new drill expects to see a 76% reduction on average in nitrogen oxides (NO_x), reactive organic gases (ROG) and particulate matter (PM) combined. The grant comes from the Carl Moyer Program, which provides monetary grants to private companies and public agencies to clean up their heavy-duty engines beyond legal requirements through retrofitting, repowering or replacing their engines with newer and cleaner ones.

France: Vicat’s sales rose by 4.6% year-on-year to Euro1.34bn in the first half of 2019 from Euro1.28bn in the same period in 2018. This was mainly due to its acquisition of Brazil’s Ciplan in late 2018. At constant scope and exchange rates its sales fell by 0.6% due to poor markets in Turkey, Switzerland, Indian and West Africa. Its earnings before interest and tax fell by 9.4% to Euro97m from Euro107m. Cement sales volumes dropped by 4.9% to 10.8Mt from 11.4Mt and concrete volumes decreased by 6.7% to 4.3Mm³ from 4.57Mm³.

“In the first half of 2019, solid performances in France, Asia and the US drove an increase in our sales and earnings before interest, taxation, deprecation and amortisation (EBITDA). These results reflect a marked improvement in the operational profitability given the on-going increase in consumed energy costs, the deteriorating macroeconomic situation in Turkey and the exceptional rainfalls in California that we experienced in the first half,” said Guy Sidos, the group’s chief executive officer (CEO).

By region, the group’s sales and earnings rose in France but fell in the rest of Europe. Sales grew in the Americas region, even without the Ciplan acquisition, but earnings fell due to a Euro10.6mn settlement payment booked in the US in the first half of 2018. The group’s sales fell in India but earnings rose due to price increases. Poor markets in Turkey and Egypt hit sales and caused a loss.

US: Nine of Cemex USA’s ready-mixed concrete (RMX) plants in the San Francisco Bay Area of Northern California have earned ISO 14001:2015 certification for their environmental management systems (EMS). The company says these are the first RMX operations in the country to achieve the designation.

The nine plants located in Berkeley, Concord, Oakland, Pleasanton, San Carlos, San Francisco, San Jose, Union City and Santa Clara, California each received certification after Lloyd’s Register, an accredited third-party organisation, audited Cemex USA’s West Region management system at corporate and site level, verifying that it conforms to the standard. In addition to the plants, Cemex USA’s Livermore office also earned the certification.

“Effective environmental management systems are critical in helping our operations meet and exceed our environmental and sustainability goals. By following well-established standards of ISO 14001:2015, our operations can continue to build on their successes while serving as inspiring examples for others to follow across the US,” said Cemex USA president Ignacio Madridejos.

Earlier in 2010 Cemex’s Clinchfield cement plant in Georgia became the first Cemex operation in the US to achieve ISO 14001:2015 certification. The company is currently in the process of achieving the certification at several other of its operations in cement, ready-mix and aggregates across the country.

Charah Solutions has been steadily building up its fly ash distribution business in recent years with an eye on the supplementary cementitious materials (SCM) market. This week it opened the third of its new series of SCM grinding plants, at Oxnard in California, US. The unit sticks out because it is focusing on grinding natural pozzolans. The plant will receive natural pozzolan by truck and rail and then use Charah’s patented grinding technology to produce pozzolan marketed under its MultiPozz brand. The previous plants in this series mentioned natural pozzolans but this is the first to promote it explicitly.

The change is potentially telling because global demand for granulated blast furnace slag (GBFS) outstrips supply. Both performance benefits and environmental regulations are pushing this. It’s a similar situation for fly ash, also driven by trends to close coal-fired power stations in some countries. As Charles Zeynel of SCM trading firm ZAG International explained in the March 2019 issue of Global Cement Magazine, “...volcanic pozzolans are a potential SCM of the future. This is gaining traction, but it’s slow progress at the moment. This will be the answer for some users in some locations.”

The problem though is that natural pozzolans are down the list of preferred SCMs for their chemical properties after silica fume, GBFS and fly ash. The first is expensive but the latter two were traditionally cheap and easy to obtain if a cement or concrete producer had access to a source or a distribution network. Natural pozzolans are very much subject to variations in availability.

It’s no surprise then that Charah is promoting natural pozzolans in a Californian plant given that state’s environmental stance. It’s unclear where Charah is sourcing their pozzolan from but they are not the only company thinking about this in the US. Sunrise Resources, for example, is working on the environmental permits for a natural pozzolan mine near Tonopah in Nevada. As it described in its company presentation, California and Nevada are the most affected states in the fly ash supply crisis because they are, “...at the end of the line when it comes to rail deliveries from power stations in central and eastern USA.” It also estimated that California used 0.9Mt of pozzolan in its cement production of which about 90% is fly ash. The state produced 9.6Mt in 2015. Other companies are also mining and distributing natural pozzolans in the US as the website for the National Pozzolan Association (NPA) lists. Although, if this line-up is comprehensive, then the field is still fairly select. Most of these companies are based in the west of the country.

One last thing to consider is that various groups are tackling a potential future lack of SCMs for the cement industry by making their own pozzolanic materials through the use of calcined clay. These groups include the Swiss-government backed LC3 project and Cementir’s Futurecem products. Using clay should bypass the supply issues with natural pozzolans but the cost of calcining it requires at the very least an investment to get started.

As concrete enthusiasts often point out, a variant of pozzolanic concrete was used by the Romans to build many of their iconic structures, some of which survive to the present day. To give the last word to the NPA, “What is old is new again: natural pozzolan is back!” If environmental trends continue and steel and coal plants continue to be shut then it might just be right.

US: Charah Solutions plans to open a grinding plant to make supplementary cementitious materials (SCM) from natural pozzolan at Oxnard in California. The unit will be accessible by truck and railway. It will sell pozzolan and other materials to concrete product manufacturers throughout south California.

The Oxnard plant will be operated in partnership with Diversified Minerals, a supplier and manufacturer of standard and custom blend cement and concrete products. It will receive natural pozzolan by truck and rail and then grind pozzolan marketed under the brand MultiPozz pozzolan. MultiPozz pozzolan will be distributed throughout Charah Solutions’ MultiSource materials network of more than 40 nationwide in the US with international sourcing and distribution.

“Fly ash is becoming more difficult to source in California, which is forcing the construction industry to look for viable alternatives. Natural pozzolan and other SCMs that meet ASTM specifications are generating very high interest. With Charah Solutions’ resources and DMI’s strategic partnership with the only active pozzolan mine in Southern California, we are both the closest and the first to bring these products to market,” said Jim Price, chief executive officer (CEO) of Diversified Minerals.

US: Trabits Group and Brookhaven National Laboratory have been selected to present joint research papers at two scientific geothermal forums on the self-repair ability of the FlexCem Lightweight Variable Density well cement product. The first presentation will be at the September 2019 meeting of the Geothermal Resources Council (GRC), which will be held in Palm Springs, California, US. The second presentation will be at the World Geothermal Congress (WGC), which will be held in Reykjavik, Iceland in April 2020.

FlexCem well cement was developed by Trabits Group following completion of a research grant from the Department of Energy Geothermal Technologies Office (GTO). It is a composite cement using Type I/II cement clinker and Ferrierite zeolite, interground in proprietary ratios.

US: CalPortland has been awarded a US$0.34m grant by the Mojave Desert Air Quality Management District (MDAQMD) as a partner in the replacement of a 1987 Trackmobile with a 2019 Rail King RK330 railcar mover at its Oro Grande cement plant in California. The new machine has been chosen to reduce its air emissions in accordance with the California Clean Air Act.

US: CalPortland has held the official opening of a rapid fill bulk cement loading station at the Oro Grande, California cement plant. The loading station is the final part of an upgrade project that originally started in 2008 when Riverside Cement owned the plant. This included two new cement loadout facilities, two distribution silos and a cement grinding mill. The upgrade cost US$58.5m.

“Our engineering staff and the Oro Grande operations team have developed a truck loadout system that is one of the fastest in the industry. The added rapid fill bulk loading stations will prevent long wait times for our customers by reducing the total number of trucks on each loading station, thereby further contributing to reduction of greenhouse gas emissions,” said Allen Hamblen, president and chief executive officer (CEO) of CalPortland.