Understanding and Recreation of a 4500 Year Old Reconstituted Limestone

对 4500 年前的再生石灰岩的了解和再造

• 批准号: 0907430
• 负责人: Michel Barsoum
• 金额: $ 12.5万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907430&HistoricalAwards=false
• 关键词: Understanding; Recreation; 4500; Year; Old

NON-TECHNICAL DESCRIPTIONHow the Great Pyramids of Giza were built has remained an enduring mystery. In the mid-Eighties a French scientist proposed that blocks of the pyramids were cast in place using limestone aggregate and a cement-like binder. In 2006, Barsoum et al. published a paper presenting evidence that some pyramid blocks were cast. In this grant, Prof. Barsoum?s group will examine more pyramid samples to obtain further evidence that they were cast, including using techniques such as C-dating. Subsequently some discussions and work on reverse-engineering the technology and exploring its potential for today?s world will begin. The impact of this work on society is truly multifaceted and universal. For one it may be possible to rewrite the history books and be of fundamental importance to Egyptologists, archeologists and to the restoration of ancient Egyptian antiquities made with that technology. It could push the date of the invention of concrete back. In the long run, it may be possible to build affordable and durable homes and shelters that are esthetically indistinguishable from natural limestone. Reconstituted limestone such as this would release roughly 80-90 % less CO2 than Portland cement-based concrete. TECHNICAL DETAILSThe microstructure of some pyramid limestones will be studied in order to understand how they were formed. Furthermore, they will carbon date these materials (i) to test the hypothesis that some of the key pyramidal structures are synthetic in nature, and (ii) to supply an independent date for the building of the pyramids. A second aspect of the project is to reverse-engineer this limestone based on what is learned from the characterization through collaborations. The long-term goal is to develop a low technology, low energy and thus low CO2, building material for the third world and possibly the developed world. In terms of outreach and education, a scaled down pyramid (with ~10 m by ~10 m base) is to be built by students at Drexel University and documented. Three-dimensional animations of how the pyramids are believed to have been built will be generated and widely disseminated via several means, including the web (e.g., U-tube).

吉萨的大金字塔是如何建造的一直是一个持久的谜。在八十年代中期，一位法国科学家提出，金字塔的石块是用石灰石骨料和类似水泥的粘合剂浇铸而成的。2006年，Barsoum等人发表了一篇论文，提出了一些金字塔块被铸造的证据。在这个基金里，巴苏姆教授？该小组将检查更多的金字塔样本，以获得进一步的证据，他们被铸造，包括使用技术，如碳年代测定。随后的一些讨论和工作的逆向工程技术和探索其潜力的今天？的世界将开始。 这项工作对社会的影响确实是多方面和普遍的。首先，它可能会改写历史书，并对考古学家，考古学家和用这种技术修复古埃及文物具有根本的重要性。它可以把混凝土的发明日期往后推。 从长远来看，有可能建造经济实惠且耐用的房屋和庇护所，这些房屋和庇护所在美学上与天然石灰石没有区别。像这样的再生石灰石释放的二氧化碳比波特兰水泥基混凝土少大约80- 90%。为了了解它们是如何形成的，将研究一些金字塔石灰岩的微观结构。此外，他们还将对这些材料进行碳定年，以（i）检验一些关键的金字塔结构在本质上是合成的这一假设，（ii）为金字塔的建造提供一个独立的日期。该项目的第二个方面是通过合作，根据从表征中学到的知识，对这种石灰石进行逆向工程。长期目标是为第三世界和可能的发达国家开发一种低技术、低能耗和低二氧化碳的建筑材料。在宣传和教育方面，德雷克塞尔大学的学生将建造一个按比例缩小的金字塔（底座约10米乘10米），并记录在案。金字塔是如何被认为已经建成的三维动画将通过几种方式产生和广泛传播，包括网络（例如，U形管）。