论文总字数：27875字

摘 要

疏港淤泥是存在于城市河道、港口、入海口等地区的固体废弃物，在城市的内河疏浚，港口的清淤过程中经常会出现疏港淤泥大量堆积而不能得到有效利用的现象，并且因为现有的处理方法大多是对其进行填埋或倾倒，无法对其进行充分的回收与利用。因此合理的处理疏港淤泥，并将其资源化成为迫切需要解决的问题，合理解决疏港淤泥的资源化问题将带来很大的社会与经济价值。

本论文从疏港淤泥的处理方法开始，进行了一系列的工作。首先对试验所用疏港淤泥进行了预处理，经过X 射线衍射（XRD），激光粒度分析（LPSA），扫描电子显微镜（SEM），X射线荧光光谱分析（XRF）、X射线计算机断层扫描（XCT）等测试以判断是否可以作为烧结陶粒的材料；随后通过疏港淤泥在不同温度下制备出轻质陶粒，对陶粒的各项性能进行了测试；最后通过烧成的陶粒进行轻骨料陶粒混凝土的设计，设计出两张强度等级的轻骨料陶粒混凝土并对混凝土的抗压强度、导热系数、微观形貌以及陶粒在混凝土中的分布进行了测试，最终得到了满足轻骨料混凝土各项要求的陶粒混凝土。

对连云港港口地区所取得的疏港淤泥进行了预处理、干燥等操作后，通过X射线衍射（XRD），激光粒度分析（LPSA），扫描电子显微镜（SEM），X射线荧光光谱分析（XRF）、X射线计算机断层扫描等方式分析了连云港港口地区湖底淤泥的主要成分，得知其主要成分为二氧化硅、氧化铝、三氧化二铁、氧化钙、氧化镁等。通过对淤泥中的化学成分质量分数进行分析，发现其符合Riley三角形中适宜烧结陶粒的区域，推断其可以作为烧成陶粒的材料，完成了对连云港疏港淤泥的物理化学性质的基本分析。

通过对淤泥进行制备陶粒的处理，并在不同温度下（1000℃、1050℃、1100℃、1150℃、1200℃）对陶粒的性能与组成进行分析，得到烧成陶粒中的主要组成成分是石英、绿泥石、蒙脱石、钠长石、莫来石等。发现在1150℃的条件下烧成的陶粒的各项性能如体积密度、吸水率、筒压强度等最佳，并且通过三维X射线显微镜对陶粒的内部结构进行重构，得出其内部孔隙率及孔径分布情况。

对陶粒混凝土进行配合比设计，分别设计了两种强度等级（C10和C15）的轻骨料混凝土。在后续的实验中对陶粒混凝土进行了包括抗压强度、导热系数、X-CT和微观形貌的测试，得到C10强度的混凝土抗压强度为10.9Mpa，导热系数为0.61W/mk，C15强度的混凝土抗压强度为16.0Mpa，导热系数为0.65W/mk，对制成的陶粒混凝土进行性能分析后发现其满足轻骨料混凝土的各项要求，可以作为保温隔热性能较好的轻骨料混凝土进行使用。

关键词：疏港淤泥；轻骨料；陶粒；制备工艺

Abstract

The shore sludge is a solid waste that exists in urban rivers, ports, estuaries and other areas. In the process of dredging of the river in the city and the dredging of the harbor, there is often a large accumulation of silt and can not be effectively utilized. Because the existing treatment methods are mostly landfill or dumping in the ocean , it can not be fully recycled and used. So it is reasonable to deal with the mud, and its resources into an urgent need to solve the problem. A reasonable solution to the problem of resource utilization will help bring great social and economic value.

In this paper, a series of work has been carried out from the treatment method of silt. X-ray diffraction analysis(XRD), laser particle size analysis (LPSA), scanning electron microscopy (SEM) and X-ray fluorescence spectroscopy (XRF) were used to determine whether it could be used as a sintered pottery. And then the properties of the ceramsite were tested by tailored silt at different temperatures. Finally, the design of the lightweight aggregate ceramsite concrete was carried out by firing the ceramsite. The strength of the concrete, the thermal conductivity, the microstructure and the distribution of the ceramsite in the concrete were tested, and finally the ceramic with the requirements of the requirements of the lightweight aggregate concrete was obtained. Granular concrete.

The main components of the lake mud in Lianyungang port area were analyzed by X - ray diffraction (XRD), laser particle size analysis (LPSA), scanning electron microscopy (SEM), X - ray fluorescence spectrometry (XRF) after the pre-operation. The main components were silica, alumina, ferric oxide, calcium oxide and magnesium oxide. The chemical components of the sludge were analyzed by mass fraction, It is found that it conforms to the suitable sintered ceramsite in the Riley triangle, and it is deduced that it can be used as the material of calcined ceramsite to complete the basic analysis of the physical and chemical properties of silt in Lianyungang port.

The properties and composition of the ceramisite were analyzed at different temperatures (1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃), and the main components of the ceramic were obtained. Ingredients are quartz, chlorite, montmorillonite, albite, mullite and so on. It is found that the properties of the ceramite fired at 1150 ° C, such as bulk density, water absorption, and cylinder strength are the best, and the internal structure of the ceramsite is reconstructed by a three-dimensional X-ray microscope. Porosity and pore size distribution.

The lightweight aggregate concrete with two strength grades (C10 and C15) were designed for the mix design of the ceramsite concrete. In the follow-up experiments, the compressive strength, thermal conductivity, X-CT and micro-morphology of the ceramsite concrete were tested. The compressive strength of concrete with C10 strength was 10.9Mpa, the thermal conductivity was 0.61W / mk, C15 Strength of the concrete compressive strength of 16.0Mpa, thermal conductivity of 0.65W / mk, made of ceramsite concrete performance analysis and found that it meets the requirements of lightweight aggregate concrete, can be used as thermal insulation performance is better Lightweight aggregate concrete for use.

Key words: Dredging port sludge; Light weight aggregate; Ceramsite; Preparation Process

目 录

摘要 I

Abstract II

第一章 绪论 1

1.1引言 1

1.1.1研究背景 1

1.1.2 研究目的及其意义 1

1.2疏港淤泥的性质、处理及再利用 2

1.2.1淤泥的物理化学性质 2

1.2.2淤泥的处理方式 2

1.2.3淤泥烧制陶粒的研究现状 2

1.3 陶粒混凝土的研究进展 3

1.4本论文研究思路 4

第二章 原材料及试验方法 6

2.1原材料及设备 6

2.1.1 原材料 6

2.1.2主要设备 6

2.1试验方法 6

2.2.1 X射线衍射 6

2.2.2 扫描电子显微镜 7

2.2.3 X射线荧光光谱分析 7

2.2.4 吸水率的测试 7

2.2.5 筒压强度的测试 7

2.2.6 X射线计算机断层扫描 8

第三章 疏港淤泥制备轻质陶粒及其性能研究 9

3.1疏港淤泥基本性能 9

3.1.1淤泥的化学成分及矿物相分析（XRF，XRD） 9

3.1.2疏港淤泥的激光粒度分析结果 10

3.1.3淤泥的微观形貌及元素分析 11

3.2轻质陶粒的烧结与性能测试 12

3.2.1轻质陶粒的烧结 12

3.2.2烧成陶粒的性能测试 13

3.3烧成陶粒的微观结构分析 16

3.4烧成陶粒的X-CT分析结果 18

3.5本章小结 19

第四章 陶粒混凝土的设计及性能研究 21

4.1原材料选择 21

剩余内容已隐藏，请支付后下载全文，论文总字数：27875字