Recycled Sand(再生砂)研究综述
Recycled Sand 再生砂 - The principal ultimate source of recycled sand is held to be represented by the thick blanket of quartz-rich sandstones that were deposited in the Cambro-Ordovician from the newly formed Arabian-Nubian Shield in the east to Mauritania in the west. [1] For this purpose, three mortars based on recycled sandstone aggregate with three different gradations were prepared. [2] The principal ultimate source of recycled sand is held to be represented by the thick blanket of quartz-rich sandstones that were deposited in the Cambro-Ordovician from the newly formed Arabian-Nubian Shield in the east to Mauritania in the west. [3] The purpose of this study is to experimentally investigate the influence of recycled sand and polyethylene (PE) fiber on the mechanical properties and pore structure of the 3DPC under high temperatures. [4] The ecological material in this study comprises earth concrete made with recycled sand (RS). [5] This study investigated GC, construction waste, and ICMs and used recycled sand and gravel as well as construction waste as substitutes for cement. [6] Traditionally, recycled sand (RS) is the superfluous potential substitute of NS, obtained during production of recycled coarse aggregates from C&D waste. [7] This study focused on the plastic shrinkage and cracking of 3D printed mortar mixed with recycled sand as fine aggregates. [8] To observe the effect of recycled sand and nano-clay on the improvement of the early strength of soil-cement (7d), 0%, 10%, 15% and 20% recycled sand were added. [9] In specific terms, the total production cost (TC), total operating cost (TOC) and effective operating cost (EOC) of a cubic meter of recycled sand were estimated in order to estimate the total sand consumption for the free-stall system and per bed year-1 as well as the equilibrium point of the amount of recycled sand, in cubic meters. [10] The objectives of this prospective and descriptive study were to (1) describe bedding bacterial counts, pH, and dry matter (DM) of five different bedding types (organic: manure solids, straw, paper fiber; inorganic: sand, recycled sand) and (2) explore the association between bedding bacterial counts with bulk tank milk quality. [11] The main purpose of this study is to determine the effect of the drying temperature on the durability indicators such as water porosity and gas permeability of mortar made of recycled sand. [12] Eighty herds using 1 of 4 common bedding materials (manure solids, organic non-manure, new sand, and recycled sand) were recruited in a multi-site cross-sectional study. [13] 63–5 mm) of recycled sand (54%) is proposed. [14] In this regard, it shall be much beneficial if some substitutes, such as recycled sands produced through processing of construction and demolition waste (CDW), could be used to replace natural sands to manufacture the qualified UHPCCs. [15] Recycled sandstones mixed with carbonate sources and the hydraulic sorting minimized the effective usage of weathering indices in this study. [16] Here, GO-modified natural sand (NS)- or recycled sand (RS)-based mortars (GONMs or GORMs) with six GO fractions (wGOs) were fabricated to explore their 28 d mechanical strengths (f28t, f28c), fracture toughness (KIC, δc), and microhardness (Hv), as well as their crystal phases (using X-ray powder diffraction) and microstructures (using scanning electronic microscopy). [17] La reutilizacion de residuos en el mundo debe llevarse a cabo debido a la carencia de recursos naturales The paper presents the results of own research confirming the possibility of reusing a waste material: fine fraction from concrete recycling as a filler in sand lime products and residues of insulating materials (rockwool and fiberglass) and recycled sand using as a insulating materials. [18] It is inferred that these recycled sandstones were originally having its source in the cratonic blocks and sedimentation in this Gondwana basin evolved through multiferous interplay of deformation due to thrust loading, changes in sea level resulting in progressive compaction and a humid climate. [19] Rock rinds as well as sands and silts in paleosols carry various detailed records ranging from thin weathered films in young (Holocene) samples to thicker, often overprinted records in recycled sands/rinds of Pleistocene and older age, some as old as Miocene and Late Oligocene. [20]再生砂的主要最终来源被认为是厚厚的富含石英的砂岩层，这些砂岩沉积在寒武纪-奥陶纪，从东部新形成的阿拉伯-努比亚地盾到西部的毛里塔尼亚。 [1] 为此，制备了三种基于具有三种不同级配的再生砂岩骨料的砂浆。 [2] 再生砂的主要最终来源被认为是厚厚的富含石英的砂岩层，这些砂岩沉积在寒武纪-奥陶纪，从东部新形成的阿拉伯-努比亚地盾到西部的毛里塔尼亚。 [3] 本研究的目的是通过实验研究再生砂和聚乙烯（PE）纤维对高温下 3DPC 的力学性能和孔结构的影响。 [4] 本研究中的生态材料包括用再生砂 (RS) 制成的土混凝土。 [5] 本研究调查了 GC、建筑垃圾和 ICM，并使用回收的沙子和砾石以及建筑垃圾作为水泥的替代品。 [6] 传统上，再生砂 (RS) 是 NS 的多余潜在替代品，是在从 C&D 废物生产再生粗骨料过程中获得的。 [7] 本研究的重点是 3D 打印砂浆与再生砂混合作为细骨料的塑性收缩和开裂。 [8] 为观察再生砂和纳米粘土对提高水泥土早期强度（7d）的影响，分别添加了0%、10%、15%和20%的再生砂。 [9] 具体而言，估算一立方米再生砂的总生产成本（TC）、总运营成本（TOC）和有效运营成本（EOC），以估算自由失速系统的总砂消耗量和每床年 1 以及再生砂量的平衡点，以立方米为单位。 [10] 这项前瞻性和描述性研究的目的是 (1) 描述五种不同垫料类型（有机：粪肥固体、稻草、纸纤维；无机：沙子、再生沙子）的垫料细菌计数、pH 和干物质 (DM) 和(2) 探讨垫料细菌计数与散装罐牛奶质量之间的关系。 [11] 本研究的主要目的是确定干燥温度对再生砂砂浆的孔隙率和透气性等耐久性指标的影响。 [12] 在一项多地点横断面研究中招募了使用 4 种常见垫料材料（粪肥固体、有机非粪肥、新沙子和再生沙子）中的一种的 80 头牛群。 [13] 建议使用 63-5 mm) 的再生砂 (54%)。 [14] 在这方面，如果可以使用一些替代品，例如通过处理建筑和拆除废物（CDW）产生的再生砂来替代天然砂制造合格的UHPCC，将是非常有益的。 [15] 再生砂岩与碳酸盐源混合和水力分选最大限度地减少了本研究中风化指数的有效使用。 [16] 在这里，制造了具有六种 GO 组分 (wGO) 的 GO 改性天然砂 (NS) 或再生砂 (RS) 基砂浆 (GOMNs 或 GORM)，以探索其 28 天的机械强度 (f28t, f28c)、断裂韧性 ( KIC、δc) 和显微硬度 (Hv)，以及它们的晶相（使用 X 射线粉末衍射）和微观结构（使用扫描电子显微镜）。 [17] La reutilizacion de residuos en el mundo debe llevarse a cabo debido a la carencia de recursos naturales 本文介绍了自己的研究结果，证实了再利用废料的可能性：混凝土回收中的细小部分作为砂石灰产品和残留物的填料绝缘材料（岩棉和玻璃纤维）和用作绝缘材料的再生砂。 [18] 据推测，这些再生砂岩最初起源于克拉通地块，冈瓦纳盆地的沉积物是通过推力载荷变形、海平面变化导致逐渐压实和潮湿气候的多方面相互作用而演化的。 [19] 古土壤中的岩皮以及沙子和淤泥带有各种详细的记录，从年轻（全新世）样品中的薄风化薄膜到更新世和更老的回收砂/皮中较厚的、经常叠印的记录，有些记录与中新世和晚渐新世一样古老. [20]