Singapore’s First 3D-Printed Bridge Planned for 2028 After Rigorous Testing

An artistic rendering of the 3D-printed bridge – credit, Singapore LTA

Singapore’s transportation officials are set to debut the use of 3D-printed concrete in the form of a new pedestrian bridge that will stretch 30 feet across a waterway.

Brought onboard a larger project to improve transit options in the Jurong River and Temah areas of the city state, it’s the country’s first use of 3D printing for this kind of infrastructure.

The project, managed by the Land Transit Authority (LTA) has just completed a testing phase where segments of printed concrete, made up of cement, sand, and water, were subjected to stress tests under the weight of large water tanks weighing 1 metric ton each.

The first printed segments formed a scale model of what will be the eventual bridge. 10 segments in total took about 40 hours to finish compared to two weeks that might have been expected with manual concrete laying.

It cost a mere $1.4 million to develop and supply the specialized 3D-printing mixture, and the whole project was carried out by Singapore Center for 3D Printing at Nanyang Technological University, with help from the engineering consultancy Witteveen+Bos and 3D concrete printing construction firm CES_Innovfab.

The real thing is slated for completion in 2028, when each of the 10 segments will be threaded together on robust steel cables until it measures 30 feet long and 15 feet wide.

3D-printed bridges have also been installed in China and the Netherlands. The longest in the world is in the Dutch city of Nijmegen, where it stretches 95 feet (29 meters) across a canal.

MORE 3D-PRINTING:

The bridge is striking to look at, with sculpted conical feet that gives it a shape a little like that of a caterpillar.

In Singapore, it’s very much early days for the technology, and the load-bearing tests carried out on the scale model will inform any future applications of the technology. It’s hoped they will be successful, as labor shortages are affecting LTA’s ability to conduct similar projects at scale.

SINGAPORE STORIES: 3D-printed homes present as a much easier engineering challenge since the structure is built from the ground up. Printing each bridge segment—set for a life of foundationless suspension, required a precise mixture of ingredients, printing flow rate, and printing speed to ensure each layer fell, filled, and dried in a perfectly even pattern to ensure no cracks would develop as the mixture hardened. Singapore’s First 3D-Printed Bridge Planned for 2028 After Rigorous Testing
Read More........

China’s new condom tax will prove no effective barrier to country’s declining fertility rate

Once the world’s most populous nation, China is now among the many Asian countries struggling with anemic fertility rates. In an attempt to double the country’s rate of 1.0 children per woman, Beijing is reaching for a new tool: taxes on condoms, birth control pills and other contraceptives.

As of Jan. 1, such items were subject to a 13% value-added tax. Meanwhile, services such as child care and matchmaking remain duty-free.

The move comes after China last year allocated 90 billion yuan (US$12.7 billion) for a national child care program giving families a one-off payment of around 3,600 yuan (over $500) for every child age three or under.

I have studied China’s demography for almost 40 years and know that past attempts by the country’s communist government to reverse slumping fertility rates through policies encouraging couples to have more children have not worked. I do not expect these new moves to have much, if any, effect on reversing the fertility rate decline to one of the world’s lowest and far below the 2.1 “replacement rate” needed to maintain a stable population.

In many ways, the 13% tax on contraceptives is symbolic. A packet of condoms costs about 50 yuan (about $7), and a month supply of birth control pills averages around 130 yuan ($19). The new tax is not at all a major expense, adding just a few dollars a month.

Compare that to the average cost of raising a child in China – estimated at around 538,000 yuan (over $77,000) to age 18, with the cost in urban areas much higher. One 36-year-old father told the BBC he is not concerned over the price hike. “A box of condoms might cost an extra five yuan, maybe 10, at most 20. Over a year, that’s just a few hundred yuan, completely affordable,” he said.

Pronatalist failings

China is one of many countries to adopt pronatalist policies to address low fertility. But they are rarely effective.

The Singapore government has been concerned about the country’s very low fertility rate for a couple of decades. It tried to devise ways to boost it through programs such as paid maternity leave, child care subsidies, tax relief and one-time cash gifts. Yet, Singapore’s fertility rate – currently at 1.2 – remains one of the lowest in the world.

The government there even started limiting the construction of small, one-bedroom apartments in a bid to encourage more “family-friendly” homes of two bedrooms or more – anyone with children will appreciate the need for more space, right? Yet even that failed to budge the low fertility rate.

The Singaporean government got a helping hand in 2012 from candymaker Mentos. In a viral ad campaign, the brand called on citizens to celebrate “National Night” with some marital boom-boom as they “let their patriotism explode” – with a hoped-for corresponding burst in births in nine months’ time. Even with the assistance from the private sector, it appears, reversing declining fertility rates is a tricky thing.

South Korea, the country with the world’s lowest fertility rate – 0.7 – has been providing financial incentives to couples for at least 20 years to encourage them to have more children.

It boosted the monthly allowance already in place for married couples to become parents. In fact, since 2006 the South Korean government has spent well over $200 billion on programs to increase the Korean birth rate.

But South Korea’s fertility rate has continued to drop from 1.1 in 2006 to 1.0 in 2017, to 0.9 in 2019, to 0.7 in 2024.

Unfavorable headwinds

The plight of China is partly of its own doing. For a couple of decades the country’s one-child policy pushed to get fertility rates down. It worked, going from over 7.0 in the early 1960s to 1.5 in 2015.

That is when the government again stepped in, abandoning the one-child policy and permitting all couples to have two children. In May 2021, the two-child policy was abandoned in favor of a three-child policy.

The hope was that these changes would lead to a baby boom, resulting in sizable increases in the national fertility rate. However, the fertility rate continued to decline – to 1.2 in 2021 and 1.0 in 2024.

While China’s historic programs to push down fertility rates were successful, they were aided by wider societal changes: The policies were in force while China was modernizing and moving toward becoming an industrial and urbanized society.

It’s policies aimed at increasing the birth rate now find unfavorable societal headwinds. Modernization has led to better educational and work opportunities for women – a factor pushing many to put off having children.

In fact, most of China’s fertility reduction, especially since the 1990s, has been voluntary – more a result of modernization than fertility-control policies. Chinese couples are having fewer children due to higher living costs and educational expenses involved in having more than one child.

Plus, China is one of the world’s most expensive countries in which to raise a child, when compared to average income. School fees at all levels are higher than in many other countries.

The ‘low-fertility’ trap

Another factor to take into consideration is what demographers refer to as the “low-fertility trap.” This hypothesis, advanced by demographers in the 2000s, holds that once a country’s fertility rate drops below 1.5 or 1.4 – far higher than China’s now stands – it is very difficult to increase it by 0.3 or more.

The argument goes that fertility declines to these low levels are largely the result of changes in living standards and increasing opportunities for women.

Accordingly, it is most unlikely that China’s three-child policy will have any influence at all on raising the fertility rate. And all my years of studying China’s demographic trends lead me to believe that making contraceptives marginally more expensive will also have very little effect.The Conversation

Dudley L. Poston Jr., Professor of Sociology, Texas A&M University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More........

Chinese company monopolises printing of Nepal’s banknotes for nearly three years

Chinese company monopolises printing of Nepal’s banknotes for nearly three years (Photo: @yicaichina/X/IANS)

Kathmandu, (IANS) China Banknote Printing and Minting Corporation appears to be monopolising the printing of Nepal’s banknotes, with the Chinese state-owned company winning bids seven times consecutively over the past three years.

On Friday, Nepal Rastra Bank (NRB), the central bank of the country, issued a letter of intent to award a contract to the Chinese company for the design, printing, supply, and delivery of 430 million pieces of NPR 1,000 denomination banknotes worth US$16.985 million.

According to the NRB’s notice, the Chinese company was selected as the substantially responsive, lowest evaluated bidder.

In nearly past three years, NRB has issued seven separate tenders for the design, printing, supply, and delivery of various denominations of banknotes. In each case, the Beijing-based company, located in the Xicheng District, emerged as the winning bidder.

Based on the contracts awarded during this period, the Chinese company is expected to earn around US$63 million from Nepal for printing approximately 2.38 billion pieces of banknotes.

The Chinese company does not have a long history of printing Nepal’s currency notes. In 2016, the Chinese company had secured the contract to print Nepal’s banknotes for the first time, according to the NRB.

On October 15 this year, NRB issued a letter of intent to print and supply 420 million pieces of NPR 50 denomination banknotes and related services. Its bid price of US$10.422 million was accepted as the lowest evaluated bid, according to the central bank’s notice.

Earlier, on June 22 this year, the same company was awarded a contract for the design, printing, supply, and delivery of 230 million pieces of NPR 500 denomination banknotes and related services. Its bid price of US$9.66 million was accepted as the substantially responsive, lowest evaluated bid.

On October 27 last year, the Chinese company won another bid to print Nepal’s banknotes. It was awarded the contract for printing and supplying 300 million pieces of NPR 100 denomination notes for US$8.996 million.

Similarly, on October 8 last year, the company won the bid to design, print, and supply 340 million pieces of NPR 10 denomination banknotes. It was awarded the contract for US$7.117 million as the lowest evaluated bidder.

Earlier, on July 10 last year, the company secured the contract for the design, printing, supply, and delivery of 350 million pieces of NPR 5 denomination banknotes at a bid price of US$5.158 million, which was also accepted as the lowest evaluated bid.

Likewise, on February 12, 2023, NRB issued a letter of intent to award the company a contract for the design, printing, supply, and delivery of 310 million pieces of NPR 20 denomination banknotes for US$4.698 million.

The last time an Indian company received a similar contract was on January 10, 2023, when NRB issued a letter of intent to award the Security Printing and Minting Corporation of India Limited a contract for the design, printing, supply, and delivery of 300 million pieces of NPR 50 denomination banknotes for US$5.048 million.

Earlier, on November 30, 2022, the same Indian company had been awarded a contract to print and supply 430 million pieces of NPR 1,000 denomination circulation banknotes for US$11.134 million.

Read More........