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Studies on the Mechanical Properties and Durability of Aerial Lime Mortars Using Mineral Admixtures

机译：用矿物掺合料研究气石灰砂浆的力学性能和耐久性

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Lime is a traditional construction material, mainly composed of calcium oxide (CaO), calcium hydroxide Ca(OH)_2, and magnesium oxide (MgO). It is derived from the calcination of limestone and has been used for construction since ancient civilizations. Through the years, the construction industry has sought to improve the chemical and physical properties of lime to boost the durability and mechanical behavior of the material, and consequently increasing the service life of buildings. However, its use has been declining, and favoring of the use of Portland cement mortars. The latter shows adequate properties, but its manufacture releases high doses of greenhouse gases into the atmosphere. This research focuses on the use of mineral admixtures to improve durability of aerial lime paste with the intention of increasing its use in masonry works. In addition, it proposes an alternative material to reduce some of the use of Portland cement mortar in construction sites. In this research, the research team tested different admixtures with slaked lime mixture to observe the behavior of the new material. A total of eight mixtures were prepared. A constant volume of aerial lime paste was used with the following admixtures: river sand, fly ash type F, brick powder, and nylon fiber. Two types of tests were performed. The first was the capillary absorption test using an adapted version of ASTM C1585-13, and the second test was performed to verify the compressive strength using ASTM C109. The results show significant improvement of the mechanical properties and durability of aerial lime paste with mineral admixtures. These combinations provide an environmentally friendly construction material that can be used in masonry works. This paper contributes to the body of knowledge by increasing the understanding on the use of mineral admixtures in aerial lime as an ecofriendly alternative to Portland cement mortars.
机译：石灰是一种传统的建筑材料，主要由氧化钙（CaO），氢氧化钙Ca（OH）_2和氧化镁（MgO）组成。它源自石灰石的煅烧，自古代文明以来就已用于建筑。多年来，建筑行业一直在寻求改善石灰的化学和物理性能，以提高材料的耐用性和机械性能，从而延长建筑物的使用寿命。但是，其使用量一直在下降，并且倾向于使用波特兰水泥砂浆。后者显示出适当的性能，但其制造过程将大剂量的温室气体释放到大气中。这项研究集中于使用矿物外加剂来改善航空石灰糊的耐久性，目的是增加其在砌体工程中的使用。此外，它提出了一种替代材料，以减少在建筑工地中使用的波特兰水泥砂浆。在这项研究中，研究小组测试了与消石灰混合物的不同掺合料，以观察新材料的性能。总共准备了八种混合物。恒定体积的航空石灰糊与以下混合物一起使用：河砂，F型粉煤灰，砖粉和尼龙纤维。进行了两种类型的测试。第一个是使用ASTM C1585-13的改进版本进行的毛细吸收测试，第二个测试是使用ASTM C109验证压缩强度。结果表明，掺有矿物掺合料的航空石灰浆的机械性能和耐久性有了显着改善。这些组合提供了可用于砖石工程的环保建筑材料。本文通过增加对航空石灰中矿物掺合料作为波特兰水泥砂浆的生态替代品的使用的理解，为知识体系做出了贡献。

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