When it comes to the most splendid building in ancient times, it is the Great Wall of Beijing. Today, more than 2,000 years have passed since Qin Shi Huang ordered the construction of the Great Wall. At that time, the Great Wall still stood in the east of the world, as stable as Mount Tai, and was admired by people all over the world. Anyone who sees the Great Wall with their own eyes will be shocked by its majesty.
In addition, there is also the Nanjing Ming City Wall built by Zhu Yuanzhang during the Ming Dynasty, which is still indestructible after 600 years of history. You know, the strongest material in contemporary times is cement, which is used when building houses. Then again, how did the Ming City Wall become so strong when there was no cement in ancient times?
The Ming City Wall of Nanjing was built in 1366 and took twenty-eight years to complete it. During this period, a lot of manpower and material resources were spent, and about 350 million city bricks were piled up to let the world see such a brilliant appearance. Now, the Ming City Wall has become the most complete preserved city wall in the world, known as the "largest city wall" in the world. In fact, the reason why it has become so strong is mainly because the ancients added some special materials to it.
In the process of building the city wall, the most important step of the ancients was rammed earth, making mud blocks that were harder than mud, and then placing it on the outside of the city wall. As for the outside of the city wall, bluestone bricks are placed. Only with double reinforcement will the walls become stronger. In addition, it is also necessary to use a special concrete made of glutinous rice, slaked lime and limestone, which can play a certain adhesion.
You know, we often use the substance of glutinous rice in our current lives. When we paste the spring joint, we will put the cooked glutinous rice on the back of the spring joint, which can be easily glued, which is the use of glutinous rice adhesion. In fact, as early as 1500 years ago, glutinous rice was used in the construction of pagodas or mausoleums. However, nowadays, no one will put glutinous rice into building materials, after all, glutinous rice is still quite rare in this era. Therefore, we have to admire the wisdom of the ancients.