Pr-Zhang-Straw Wood Structure Building

7/31/2019 Pr-Zhang-Straw Wood Structure Building

1/34

Straw/Wood StructuralStraw/Wood StructuralBuildingBuilding

Nanjing Forestry UniversityNanjing Forestry University

NanjingNanjing, China, ChinaNovember, 2005November, 2005


2/34

ContentsContents

IntroductionIntroduction

MaterialsMaterials

Demonstrated houseDemonstrated house


3/34

1. I nt roduct ion1. I nt roduct ion


4/34

Traditional construction materials (Brick,Traditional construction materials (Brick,Concrete etc.) are meeting problemsConcrete etc.) are meeting problems

-- Serious destruction of farmlandSerious destruction of farmlandChina is supporting 22% of the people in the world with 7%of theChina is supporting 22% of the people in the world with 7%of the farmland infarmland inthe world. 0.6 billion mthe world. 0.6 billion m22 farmlands were consumed for manufacturing bricksfarmlands were consumed for manufacturing bricksevery year in China.every year in China.

-- High consumption of energyHigh consumption of energy60 million ton coal were consumed for manufacturing bricks every60 million ton coal were consumed for manufacturing bricks every year inyear inChina.China.Lots of energy runs to keep the indoor temperature of brickLots of energy runs to keep the indoor temperature of brick--concreteconcretestructure buildings in winter and summer for its low thermal insstructure buildings in winter and summer for its low thermal insulationulation

properties.properties.


5/34

New types of construction materials areNew types of construction materials are

being developedbeing developed

-- Heat insulation & Energy savingHeat insulation & Energy saving

-- Sound insulationSound insulation

-- Light & strongLight & strong

-- Friendly environmentFriendly environment-- Fire retardantFire retardant


6/34

StrawStraw--wooden building has been developedwooden building has been developed

byby NanjingNanjing Forestry UniversityForestry University

WoodWood

St ructural WoodSt ructural Wood--based panelbased panel

StrawStraw -- based panelbased panel


7/34

2. Mater ials2. Mater ials


8/34

2.1 Wood2.1 Wood SpeciesSpecies

Poplar, Chinese fir, PinePoplar, Chinese fir, Pine

RequirementsRequirements

--Fire retardantFire retardant--PreservativePreservative

ApplicationsApplications

Frame 2Frame 2 44


9/34

2.2 St ructural Wood2.2 St ructural Wood-- based panelbased panel

PanelsPanels

OSBOSBLVLLVLMultilayer plywoodMultilayer plywood

RequirementsRequirements--Fire retardantFire retardant

--PreservativePreservative

ApplicationsApplicationsII--joist beam, flooring, sheathingjoist beam, flooring, sheathing


10/34

2.3 St raw2.3 St raw -- based panelbased panel

(1)(1) Low density strawLow density straw--based panelbased panel

ProcessingProcessing

Straws Trimming Cutting Blending

FormingPressingCutting

Low density straw-

based board


11/34

Steam injection press for producing

low density straw-based panel


12/34

PropertiesPropertiesDensity:Density: 200~400 kg/m200~400 kg/m33

Heat conductivity:Heat conductivity:0.042~0.063 W/m0.042~0.063 W/m..KK

(insulation materials < 0.25 W/m(insulation materials < 0.25 W/m..K)K)

Heat conductivity of different construction materials


13/34

ApplicationApplication

Covered with cementboard or gypsum board

Covered with cement

mortar or tile on both sides

Covered with wood-based

composites or metal

4 patents havebeen granted

Covered by GypsumBoard or

Wood-based Panel

Low density straw-

based board


14/34

2.3 St raw2.3 St raw -- based panelbased panel

(2)(2) Medium density strawMedium density straw--based panelbased panel

It is manufactured with the similar technological process of woodbased

particleboard. The properties of boards can meet or exceed the standardof particleboard. This environment friendly board without formaldehyde

emission is mainly used in furniture manufacturing, indoor decorating

and packaging.


15/34

Flow ChartFlow Chart


16/34

Straws


17/34

Cutting


18/34

Hammering


19/34

Drying and Screening


20/34

Blending


21/34

Forming


22/34

Prepressing


23/34

Hot-pressing


24/34

Trimming


25/34

Sanding


26/34

Built Production lines in ChinaBuilt Production lines in China

HubeiHubei JingzhouJingzhou:: 5000050000mm33

JiangsuJiangsu HuianHuian:: 5000050000mm33

JiangsuJiangsu GuannanGuannan:: 3000030000mm33

HerongjiangHerongjiang HulinHulin:: 5000050000mm33 SichuanSichuan ChengduChengdu:: 5000050000mm33

ShandongShandong ZiboZibo:: 1500015000mm33

Shanghai:Shanghai: 1500015000mm33


27/34

3. Demonst rated House3. Demonst rated House


28/34

3.1 Structure3.1 Structure

FrameFrame

PinePine

II--joist beamjoist beam

LVLLVL

OSBOSB


29/34


OSBOSB Low density strawLow density straw--

based panelbased panel

Medium strawMedium straw--

based panelbased panel


30/34



31/34

3.2 Character ist ics3.2 Character ist ics Light and heat insulationLight and heat insulation

0

0.2

0.4

0.6

0.8

1

1.2

A B C D

Wall Types

C

u

m

u

lativ

e

H

eat

Co

n

d

u

ctan

ce

k

w

.h

/m

2

Nanjing

Beijing

Haerbin

The heat conductance of the straw-based

sandwich wallboard with the thickness

of 100mm(Type C) is much lower than

that of the brick wall (Type A). Even its

thickness is half of the brick wall (Type

D), the heat conductance is half of the

bick wall as well and similar to the

concrete whit gas (Type B). The little the

heat conductance of wall is, the lower theenergy consumption is. The straw-based

sandwich wallboard can meet the

national demand of 50% energy saving

of new building materials.


32/34

Environment friendly: No formaldehydeEnvironment friendly: No formaldehydeemissionemission

Lower cost: less than 1500 Yuan/mLower cost: less than 1500 Yuan/m22

RegrownRegrownraw materialsraw materials

3.2 Character ist ics3.2 Character ist ics


33/34

Straw/wood structural building has theStraw/wood structural building has the

characteristics of light, heat insulation,characteristics of light, heat insulation,

environment friendly, easy to processenvironment friendly, easy to process

and so on. It will have a bright futureand so on. It will have a bright future

in China.in China.


34/34

Pr-Zhang-Straw Wood Structure Building

Documents

Transcript of Pr-Zhang-Straw Wood Structure Building