Hi-tech Tokyo Superlight cellular lightweight concrete factory comes to Elpitiya
Tokyo Cement, the manufacturers of Tokyo Superlight, Sri Lanka’s first cellular lightweight concrete block, ceremonially inaugurated their state-of-the-art production plant with expanded capacity in Elpitiya recently.
The factory was declared open by Tokyo Cement Company (Lanka) PLC Chairman Dr. Harsha Cabral P.C, in the presence of Managing Director S.R. Gnanam and other distinguished guests representing Tokyo Cement Group.
Setting up a factory in Elpitiya, Tokyo Cement was the first to introduce Cellular Lightweight Concrete technology to Sri Lanka, at a time when it was rapidly gaining popularity in the world as the most efficient method to build. With the backing of Tokyo Cement Group’s trusted reputation and exceptional service, Tokyo Superlight market share experienced a promising increase within a short span of time. With the rise of modern construction projects adopting global technologies and trends, the company decided to invest further on this innovative technology by expanding production capacity to 100m3 per day. The enhanced operations of the Elpitiya plant now stands ready to meet growing demands from contemporary property developers and home builders who seek maximum value in return of their investment.
Tokyo Cement Company (Lanka) PLC Managing Director S.R. Gnanam speaking at the event said: “2017 marks a landmark year for Tokyo Cement Group, adorned with many feats that re-establish our leadership position in the market. We have always been pioneers in our field with many of Sri Lanka’s firsts under our belt. Today we are decreeing another one of them by inaugurating the country’s first and only cellular lightweight concrete block manufacturing plant. When we introduced the Tokyo Superlight cellular lightweight concrete block, the industry needed a bit of convincing about its versatility. But today it is the structurally and economically proven choice that can successfully meet all types of construction needs. We are confident about the capabilities of Tokyo Superlight block as the most innovative, efficient and environmentally conscious choice, to deliver great value to building projects both commercial or residential.”
What makes Tokyo Superlight unique is its chemical composition that traps millions of micro air bubbles, making it much lighter yet stronger, unlike traditional cement blocks that use coarse aggregates. Despite being three times lighter than conventional blocks the Tokyo Superlight block records twice the compressive strength. It is the only concrete block with inter-locking capability to help reduce mortar usage. This is best suited for projects that demand faster building time while overcoming the shortage of skilled labour. The robustness of the block helps reduce cement usage by half and can save up to 50 percent of the labour cost making it the most efficient building material. This hi-tech concrete block comes in three thicknesses, namely ‘4’, ‘6’ and ‘9’ inches, to meet varying requirement types in mid to high rise building projects.
The eco-friendly, sustainable production process adopted at the Elpitiya plant gives Tokyo Superlight a carbon footprint of just 1/10 of the traditional clay brick and 1/7 of the cement block, making it the greener choice in construction. In addition, Tokyo Superlight blocks provide superior thermal and acoustic insulation while being more fire resistant, making it 30 percent more energy efficient compared to other building materials.
Tokyo Superlight cellular lightweight concrete (CLC) block comes to the market from Tokyo Cement Group. Tokyo Cement Group has earned its reputation as the most trusted supplier of high quality cement and concrete used in infrastructure projects that have stood the test of time. Having supplied top quality products for constructions that mark Sri Lanka’s growth, from iconic structures gracing the Colombo skyline, to overhead bridges, railroads and suspended highway networks; the company has cemented its legacy as a partner in nation building.
Following the 2016 Cabinet decision to control the use of asbestos, numerous discussions and dialogues were held on and off the mainstream media concerning the pressing matter.
As a widely popular roofing material used by majority of the populace in the country, it is important to take a look at the true nature of this material and whether it has the potential to cause health hazards as presumed.
Asbestos is the commercial name given to a naturally occurring fibrous mineral. In the past, asbestos reigned the construction world as one of the most versatile materials. Today, the name has earned a negative image, facing a barrage of criticism on potential health hazards. However, there is a common misconception among many that the material asbestos is a single element, but this is far from the reality.
Asbestos is categorized into two distinct groups – serpentine and amphibole. The serpentine group consists of chrysotile fibres, while the amphibole group further divides into five distinct fibre types namely crocidolite, amosite, anthophyllite, tremolite, and actinolite. In other words, asbestos is in fact a naturally occurring fibrous material comprising a set of six distinct minerals.
According to the International Chrysotile Association (ICA), which released its latest collection of research papers titled ‘Compilation: Recently published studies in Chrysotile fibres – 2016’, several comprehensive studies conducted on the toxicology (the study of the nature, effects, and detection of poisons and the treatment of poisoning) and epidemiology (the branch of medicine that deals with the
study of the causes, distribution, and control of disease in populations) of the two types of mineral groups.
Solubility is one of the key factors of a mineral which determines its toxicity and potential health effects. A study on ‘Biopersistence’ – analyses the fibres’ solubility nature in the lung, and the lung’s ability to clear the external elements out of the system. Accordingly, ICA clarifies that based on biopersistence studies as well as ‘sub-chronic inhalation toxicology’ studies, chrysotile fibres at highly concentrated exposure (of up to 5000 times the current threshold limit value – 0.1 fibres per cubic centimetre), caused no pathological response. Moreover, chrysotile fibres are soluble in lungs, and does not reach pleural cavity.
However, when the same tests were conducted on amphibole asbestos fibres, the results were highly pathogenic (potential for causing disease) and even produced interstitial (space between organs/tissues) fibrosis as well as pleural inflammation. In addition, it was also observed that fibres had the potential to move to the pleural cavity. This is mainly due to the amphibole fibres being least soluble in the lungs.
Conversely, chrysotile asbestos fibres displayed very low biopersistence, while the amphibole asbestos fibres displayed a very high level of biopersistence. ICA research papers further stressed that chrysotile asbestos produce negligible health effect in comparison to amphibole asbestos and under controlled conditions, it can be used safely. On the other hand, amphibole asbestos comprising solid silicate fibres with negligible solubility and high biopersistence holds higher potential in causing diseases even with short-term exposure.
At present only chrysotile fibres are used in commercial applications in Sri Lanka, and they are used in the manufacture of high density roofing sheets. Comprehensive tests have been conducted globally on biopersistence studies and subchronic inhalation toxicology studies where they have clearly shown that under controlled conditions, chrysotile can be used safely. Chrysotile fibre roofing industry has successfully served the nation for more than 70 years. Therefore, it’s crucial to consider the impact on the industry and the populace of the country in the long run, if the regulatory decisions were to be implemented.