In Taiwan, there’s no getting away from concrete.
Since the 1960s, the vast majority of buildings added to the country’s towns and cities have been built with reinforced concrete (RC). Thousands of concrete tetrapods defend the seaside against erosion. Countless waterways are hemmed in by concrete levees.
After 1949, a great deal of concrete was used to fortify the coast and outlying islands. According to a propaganda article published by the Chinese Nationalist Party (KMT) regime in 1963, in the preceding four years, close to 11 percent of cement production had gone to the armed forces.
Photo: Steven Crook
The overuse of this material exacerbates flooding. Concrete paving stops rainfall from soaking into the land. Instead, it flows rapidly to lower ground.
The country now pours less concrete than before, in part because economic growth has slowed. Cement production last year totaled 10.07 million tonnes, about half the average annual output during the 1990s. Domestic per capita consumption of cement is now slightly below the global average, which has more than doubled since 1995.
Jerry Chiu (邱暉仁), general secretary of the Taiwan Concrete Institute (TCI), acknowledges that the cement industry, like the steel industry, consumes a great deal of energy and emits vast quantities of carbon dioxide.
Photo: Steven Crook
But without those industries, he says, society wouldn’t have reached its current level of development.
“Concrete and steel allow us to build inexpensive, safe, comfortable and durable structures,” Chiu says, stressing that his opinions don’t necessarily reflect those of the TCI.
“Environmental damage is the result of human desires, not the materials used. If we can’t reduce humanity’s demands, we need to ensure that the materials we use don’t consume a lot of energy, and that they’re recyclable. That’s why, in recent years, the TCI has focused on circular-economy issues,” Chiu says.
Photo courtesy of Asia Cement Corp
The TCI is a government-backed non-profit organization which brings together senior members of the concrete industry, architects, engineers, scholars and government officials.
According to the TCI’s Web site, its goals include: nurturing R&D which will bring about technological advances that can benefit society and protect the environment; cultivate a professional workforce for the industry; promote “greener” types of concrete and the sustainable use of natural resources; build relations with similar bodies outside Taiwan; and help develop the codes and regulations which govern the industry.
Chiu sees the durability of concrete as one of its great advantages. When he says a concrete structure could be used by multiple generations, he isn’t exaggerating. The Temple of Mercury in Baiae, Italy, features a 21.5m-diameter concrete dome that dates from the 1st century BC.
Photo courtesy of the Hualien County Government
Unfortunately, there’s a gulf between what’s possible and what’s typical. Many buildings are scrapped long before they become decrepit.
In Green Architecture: An Asian Perspective, Lin Hsien-te (林憲德) writes that, on average, buildings in Taiwan are demolished before they’re 40 years old. Such rapid turnover, while normal throughout East Asia, is “a severe waste of resources,” he writes.
CORROSIVE ENVIRONMENT
One of the reasons why RC buildings in Taiwan don’t last very long is the exceptionally corrosive environment. The climate is warm and humid, and much of the population lives near the sea. Most anti-corrosion treatments, such as painting, are temporary. Galvinizing steel bars, or coating them with epoxy resin, isn’t always effective.
In his book, Lin — chair professor of architecture at National Cheng Kung University — explains how concrete’s “profound” environmental impact isn’t limited to huge carbon emissions.
“For an RC structure, every square meter in floor area generates 1.8kg of dust and 0.14 cubic meters of solid waste during construction and 1.23 cubic meters of solid waste when the building is demolished.”
Many people advocate the use of wood instead of concrete, he adds.
“Whether that material is appropriate depends, I think, on the situation. Unfortunately, Taiwan doesn’t have enough space for everyone to live in a wooden house with a yard,” he says.
Chiu argues that concrete is more suitable, given the frequency of typhoons and earthquakes.
Others believe that embracing cross-laminated timber (CLT) — production of which is less water and energy-intensive than cement — could reduce the construction sector’s impact on the environment. CLT is similar to plywood but much stronger, and it’s said to be as fireproof as concrete. In the past decade, mostly-CLT buildings with nine or more stories have been erected in Australia, Italy, Norway and the UK.
WoodTek, a Taiwanese company specializing in CLT buildings, says it can make CLT structures that’ll stay watertight and termite-proof.
Chiu thinks that, with better construction techniques and the use of renewable energy to manufacture steel and cement, Taiwan can become more sustainable without giving up concrete.
“We’re already moving in this direction,” he says.
Taiwan’s two largest cement companies, Taiwan Cement Corp (TCC) and Asia Cement Corp (ACC), have committed to becoming carbon neutral by 2050, and TCI is supporting their efforts to develop low carbon and recycling technologies.
TCC’s Web site states that, en route to carbon neutrality, the company aims to reduce its carbon emissions from 849kg to 585kg per tonne of cement by 2030 by reforestation of quarries, carbon capture technologies and recovering waste heat so as to reduce electricity consumption. It will also step up its purchases of renewable energy, and burn increasing quantities of solid recovered fuel, wood chips, sewage sludge, pulp sludge and waste plastic to power its plants.
ACC has invested in water recycling. According to the Web site of the Far Eastern Group, ACC’s parent company, every drop of water used by the Hualien cement plant is reused six times.
AGGREGATE
Cement is just one component of concrete. Typically, 60 to 80 percent of poured concrete is inert filler called aggregate.
Sourcing aggregate is one of the most controversial and destructive aspects of the industry. The illegal removal of gravel from riverbeds has been blamed for bridge collapses. Taking sand from beaches or the ocean floor destroys marine life.
Concrete retrieved during demolitions — part of the solid waste Lin refers to — can be crushed for reuse as aggregate. (The steel in RC is also separated for recycling.) But, Chiu says, persuading consumers that recycled concrete is as good as traditional aggregate takes some effort.
Several of the articles in Concrete Technology, a periodical published by the TCI, describe efforts to make the industry greener. Others complain about the regulations that govern cement production.
“Are you saying that the concrete industry isn’t environmentally friendly? In fact, it helps other industries to solve many waste problems,” asserts an article in April last year, before going on to allege that waste sludge from semiconductor fabs is sometimes illegally dumped after it’s been listed as having been reprocessed into cement mortar.
According to at least one study, such sludge (like fly ash) can take the place of some Portland cement and also make for stronger mortar. However, the production process causes “considerable” air pollution.
The same article goes on to say that Ministry of Economic Affairs rules encourage the use of blast furnace slag as aggregate, but this policy has led to problems like those that occurred some years ago in Songshan Cultural and Creative Park (松山文創園區) in Taipei. There, incorporating unsuitable slag led to surfaces absorbing excess water and breaking out in what some call “concrete acne.”
Instead of drafting new rules that specifically target the cement industry, Taiwan should reform the legal-regulatory environment, so as to incentivize sustainable architecture and porous surfaces, limit urban sprawl and preserve remaining green spaces. This would bring the country a whole raft of benefits, a reduction in the amount of concrete poured each year being just one of them.
Steven Crook, the author or co-author of four books about Taiwan, has been following environmental issues since he arrived in the country in 1991. He drives a hybrid and carries his own chopsticks. The views expressed here are his own.
In 2020, a labor attache from the Philippines in Taipei sent a letter to the Ministry of Foreign Affairs demanding that a Filipina worker accused of “cyber-libel” against then-president Rodrigo Duterte be deported. A press release from the Philippines office from the attache accused the woman of “using several social media accounts” to “discredit and malign the President and destabilize the government.” The attache also claimed that the woman had broken Taiwan’s laws. The government responded that she had broken no laws, and that all foreign workers were treated the same as Taiwan citizens and that “their rights are protected,
The recent decline in average room rates is undoubtedly bad news for Taiwan’s hoteliers and homestay operators, but this downturn shouldn’t come as a surprise to anyone. According to statistics published by the Tourism Administration (TA) on March 3, the average cost of a one-night stay in a hotel last year was NT$2,960, down 1.17 percent compared to 2023. (At more than three quarters of Taiwan’s hotels, the average room rate is even lower, because high-end properties charging NT$10,000-plus skew the data.) Homestay guests paid an average of NT$2,405, a 4.15-percent drop year on year. The countrywide hotel occupancy rate fell from
In late December 1959, Taiwan dispatched a technical mission to the Republic of Vietnam. Comprising agriculturalists and fisheries experts, the team represented Taiwan’s foray into official development assistance (ODA), marking its transition from recipient to donor nation. For more than a decade prior — and indeed, far longer during Chinese Nationalist Party (KMT) rule on the “mainland” — the Republic of China (ROC) had received ODA from the US, through agencies such as the International Cooperation Administration, a predecessor to the United States Agency for International Development (USAID). More than a third of domestic investment came via such sources between 1951
March 24 to March 30 When Yang Bing-yi (楊秉彝) needed a name for his new cooking oil shop in 1958, he first thought of honoring his previous employer, Heng Tai Fung (恆泰豐). The owner, Wang Yi-fu (王伊夫), had taken care of him over the previous 10 years, shortly after the native of Shanxi Province arrived in Taiwan in 1948 as a penniless 21 year old. His oil supplier was called Din Mei (鼎美), so he simply combined the names. Over the next decade, Yang and his wife Lai Pen-mei (賴盆妹) built up a booming business delivering oil to shops and